FOR SNIPER RIFLE, 7.62 MM, M40A3 - Public...

TM 05539-IN

U.S. MARINE CORPS TECHNICAL MANUAL

ORGANIZATIONAL AND INTERMEDIATE MAINTENANCE MANUAL WITH REPAIR PARTS LIST (RPL)

FOR

SNIPER RIFLE, 7.62 MM, M40A3NSN: 1005-01-495-0843

PN: 99004A1000


PN: 08009A0000

MARINE CORPS SYSTEMS COMMANDQUANTICO, VA 22134-6050

DISTRIBUTION STATEMENT: DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES AND THEIR CONTRACTORS. THIS PUBLICATION IS REQUIRED FOR ADMINISTRATION AND OPERATIONAL PURPOSES. OTHER REQUESTS FOR THIS DOCUMENT MUST BE REFERRED TO COMMANDER, MARINE CORPS SYSTEMS COMMAND (PG-13 PM IW), QUANTICO, VA 22134-6050.

DESTRUCTION NOTICE: DESTROY BY ANY METHOD THAT WILL PREVENT DISCLOSURE OF CONTENTS OR RECONSTRUCTION OF THE DOCUMENTS.

FOR OFFICIAL USE ONLY

OCTOBER 2008PCN 184 055392 00

DEPARTMENT OF THE NAVYHeadquarters, U.S. Marine Corps

Washington, DC 20380-0001

31 October 2008

1. This Technical Manual (TM), authenticated for Marine Corps use and effective upon receipt, provides information on the Sniper Rifle, 7.62 mm, M40A3, NSN: 1005-01-495-0843 and the Sniper Rifle, 7.62 mm, M40A5, NSN: 1005-01-567-7827; TM 05539-IN.

2. Submit notice of discrepancies or suggested changes on a NAVMC 10772. The NAVMC may be submitted via the Internet using website https://pubs.ala.usmc.mil/ front.htm, scrolling down to the NAVMC 10772 Tracking Program and following instructions provided. It may also be submitted by electronic mail to [email protected] or by mailing paper copy NAVMC 10772 in an envelope addressed to Commander, Marine Corps Systems Command, Attn: Assistant Commander Acquisition and Logistics (LOG/TP), 814 Radford Blvd, Suite 20343, Albany, Georgia 31704-0343.

3. TM 05539D-24A&P/2 of November 2004 is hereby superseded for Marine Corps use.

BY DIRECTION OF THE COMMANDANT OF THE MARINE CORPS

OFFICIAL:

A. D. BIANCAProgram Manager, IW, PG-13Marine Corps Systems Command

DISTRIBUTION: EDO

TM 05539-IN

WARNING SUMMARY This warning summary contains general safety warnings and hazardous materials warnings that must beunderstood and applied during operation and maintenance of this equipment. Failure to observe these pre-cautions could result in serious injury or death to personnel.

WARNING Use only authorized ammunition manufactured to U.S. or North Atlantic Treaty Organization(NATO) specifications.

WARNING Always assume every weapon is loaded until it is determined through visual and physical inspectionthat it is not. Procedures for clearing/unloading the weapon are outlined in TM 05539-OR_. Failure tofollow this warning may cause injury or death to personnel.

WARNINGThe firing pin is under spring tension. Release it slowly to prevent injury to personnel.

WARNINGDO NOT remove or adjust sear engagement screw, overtravel screw or trigger adjustment screw intrigger housing. The only authorized adjustment is to the fine tune adjustment screw (weight).

WARNINGDO NOT interchange bolt body assemblies from one M40A3/A5 Sniper Rifle to another M40A3/A5Sniper Rifle. This can cause a malfunction to the weapon. Failure to follow this warning my causeinjury or death to personnel.

WARNING After unloading the weapon, and with the bolt locked to the rear, visually and physically check thechamber for ammunition. Failure to follow this warning may cause injury or death to personnel fromnegligent discharge.

a

TM 05539-IN

WARNING DO NOT store the weapon with live ammunition in either the chamber or magazine. Failure to followthis warning may cause injury or death to personnel.

WARNING Under NO circumstances should live ammunition be shipped with the weapon, either in the shippingbox, magazine or chamber. Failure to follow this warning may cause injury or death to personnel.

WARNINGOnce the extractor has popped off, slowly release the bolt disassembly tool handle to prevent the ejec-tor and ejector spring from flying off. Failure to follow this warning may cause injury to personnel.

b

TM 05539-IN

TECHNICAL MANUAL MARINE CORPS SYSTEMS COMMANDTM 05539-IN Quantico, VA, October 2008

U.S. MARINE CORPS TECHNICAL MANUAL

ORGANIZATIONAL AND INTERMEDIATEMAINTENANCE MANUAL WITH REPAIR PARTS LIST (RPL)

FOR


PN: 99004A1000

AND


PN: 08009A0000DISTRIBUTION STATEMENT: DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES AND THEIR CONTRACTORS. THIS PUBLICATION IS REQUIRED FOR ADMINISTRATION AND OPERATIONAL PURPOSES. OTHER REQUESTS FOR THIS DOCUMENT MUST BE REFERRED TO COMMANDER, MARINE CORPS SYSTEMS COMMAND (PG-13 PM IW), QUANTICO, VA 22134-6050.

DESTRUCTION NOTICE: DESTROY BY ANY METHOD THAT WILL PREVENT DISCLOSURE OF CONTENTS OR RECONSTRUCTION OF THE DOCUMENTS.

Table of ContentsWP/PageNumber

Warning Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . aHow to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

CHAPTER 1 GENERAL INFORMATION, EQUIPMENTDESCRIPTION AND DATA, AND PRINCIPLES OF OPERATION

WP 0001 00 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0001 00-1WP 0002 00 Equipment Description and Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0002 00-1WP 0003 00 Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0003 00-1

CHAPTER 2 TROUBLESHOOTING

WP 0004 00 Troubleshooting Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0004 00-1WP 0005 00 Troubleshooting Symptom Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0005 00-1WP 0006 00 Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-1

i

TM 05539-IN

Table of Contents - ContinuedWP/PageNumber

CHAPTER 3 ORGANIZATIONAL MAINTENANCE

WP 0007 00 Service Upon Receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0007 00-1WP 0008 00 Preventive Maintenance Checks and Services (PMCS)

Including Lubrication Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0008 00-1WP 0009 00 General Maintenance Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0009 00-1WP 0010 00 Cleaning the Weapon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0010 00-1WP 0011 00 Magazine Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0011 00-1WP 0012 00 Disassembly of Weapon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-1WP 0013 00 Bolt Body Assembly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0013 00-1WP 0014 00 Firing Pin Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0014 00-1WP 0015 00 Trigger Guard and Magazine Well Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . 0015 00-1WP 0016 00 Removal of Barreled Receiver from Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0016 00-1WP 0017 00 Muzzle Break Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0017 00-1WP 0018 00 Bipod Assembly Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0018 00-1WP 0019 00 Reassembly of Weapon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0019 00-1WP 0020 00 Function Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0020 00-1WP 0021 00 Preparation for Storage and Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0021 00-1

CHAPTER 4 INTERMEDIATE MAINTENANCE

WP 0022 00 Barreled Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0022 00-1WP 0023 00 Bolt Body Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0023 00-1WP 0024 00 Safety and Trigger Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0024 00-1WP 0025 00 Stock Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0025 00-1WP 0026 00 Skim Glassing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0026 00-1WP 0027 00 Telescope Assembly and Telescope Rings Maintenance . . . . . . . . . . . . . . . . . . 0027 00-1WP 0028 00 Suppressor Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0028 00-1

CHAPTER 5 SUPPORTING INFORMATION

WP 0029 00 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0029 00-1WP 0030 00 Expendable and Durable Items List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0030 00-1WP 0031 00 Tool Identification List (Includes Special Tools) . . . . . . . . . . . . . . . . . . . . . . . . 0031 00-1WP 0032 00 Manufactured Items Illustrations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0032 00-1WP 0033 00 Quality Assurance Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0033 00-1WP 0034 00 Repair Parts List (RPL) Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0034 00-1WP 0035 00 Repair Parts List (RPL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0035 00-1

Figure PageNumber Number

BOLT, BARREL, AND RECEIVER WITH TRIGGER ASSEMBLY, MUZZLE BRAKE AND SUPPRESSOR .................................................... 1 1-1STOCK, BIPOD, TRIGGER GUARD, MAGAZINE AND SLING........... 2 2-1TELESCOPE WITH OPTICAL PLATFORM AND RING MOUNT ........ 3 3-1SUPRESSOR CASE AND CLEANING BRUSH....................................... 4 4-1

NATIONAL STOCK NUMBER INDEX.................................................... I-1PART NUMBER INDEX ............................................................................ I-2Index ............................................................................................................Index-1

ii

TM 05539-IN

HOW TO USE THIS MANUAL

INTRODUCTION

1. This manual contains operating instructions, maintenance procedures, emergency procedures, and troubleshooting proce-dures for the 7.62 mm, M40A3/A5 Sniper Rifle. It is divided into five chapters.

2. This manual is written in work package format:a. Chapters divide the manual into major categories of information (e.g., General Information, Equipment Descrip-

tion and Data, and Principles of Operation).b. Each chapter is divided into work packages, which are identified by a 6-digit number (e.g., 0001 00, 0002 00, etc.)

located on the upper right-hand corner of each page. The work package page number (e.g., 0001 00-1, 0001 00-2,etc.) is centered at the bottom of each page.

c. If a Change Package is issued to this manual, added work packages use the 5th and 6th digits of their number toindicate new material. For instance, work packages inserted between WP 0001 00 and WP 0002 00 are numberedWP 0001 01, WP 0001 02, etc.

3. Read through this manual to become familiar with its organization and contents before attempting to operate or maintainthe equipment.

CONTENTS OF THIS MANUAL.

1. A Warning Summary is located at the beginning of this manual. Become familiar with these warnings before operating ormaintaining the equipment.

2. A Table of Contents, located in the front of the manual, lists all chapters and work packages in the publication. If you can-not find what you are looking for in the Table of Contents, refer to the alphabetical Index at the back of the manual.

3. Chapter 1, General Information, Equipment Description and Data, and Principles of Operation, provides general infor-mation about the equipment, identifies the major components and systems, and describes how the components and sys-tems work.

4. Chapter 2, Troubleshooting, which includes Troubleshooting Introduction, Troubleshooting Symptom Index, and Trouble-shooting Procedures, provides symptoms and procedures pertaining to failures that could occur during operation of theM40A3/A5 Sniper Rifle.

5. Chapter 3, Organizational Maintenance, includes Service Upon Receipt, Preventive Maintenance Checks and Services(PMCS) Including Lubrication Instructions, General Maintenance Instructions, Cleaning the Weapon, and Preparationfor Storage and Shipment. This chapter provides procedures to maintain the M40A3/A5 Sniper Rifle.

6. Chapter 4, Intermediate Maintenance, provides Intermediate level maintenance procedures.7. Chapter 5, Supporting Information, includes References, Expendable and Durable Items List, Tool Identification List,

Manufactured Items Illustrations, Quality Assurance Checklist, Repair Parts List (RPL) Introduction, and Repair PartsList (RPL). This chapter provides information pertaining to references, components listing, expendable/durable suppliesand material list.

8. An alphabetical Index is located at the back of this manual.

iii

TM 05539-IN

FEATURES OF THIS MANUAL

1. This manual contains information on operating and maintaining the M40A3/A5 Sniper Rifle. 2. WARNINGs, CAUTIONs, NOTEs, subject headings, and other important information are highlighted in BOLD print as a

visual aid.

WARNINGA WARNING indicates a hazard which may result in injury or death to personnel.

CAUTIONA CAUTION is a reminder of safety practices or directs attention to usage practices that may result indamage to equipment.

NOTEA NOTE is a statement containing information that will make the procedures easier to perform.

3. Statements and words of particular interest may be printed in CAPITAL LETTERS to create emphasis.4. Within a procedural step, reference may be made to another chapter or work package in this manual or to another manual.

These references indicate where you should look for more complete information. If you are told: “Remove the safety andtrigger mechanism (WP 0024 00)”, go to WP 0024 00 in this manual for instructions.

5. Illustrations are placed after, and as close to, the procedural steps to which they apply. Callouts placed on the art are textor numbers.

6. Numbers located at lower right corner of art (e.g., M40-018; M40-019, etc.) are art control numbers and are used fortracking purposes only. Disregard these numbers.

iv

TM 05539-IN

CHAPTER 1GENERAL INFORMATION, EQUIPMENT

DESCRIPTION AND DATA, AND PRINCIPLES OF OPERATION

TM 05539-IN

4

GENERAL INFORMATION 0001 00

SCOPE

1. Type of Manual. Organizational and Intermediate Maintenance Manual for the 7.62 mm, M40A3/M40A5 Sniper Rifle.Basic operator’s procedures are outlined in TM 05539-OR_, Operator’s Manual with Components List for Sniper Rifle,7.62 mm, M40A3/M40A5.

2. Equipment Name and Model Number. The weapon, 7.62 mm, M40A3/A5 Sniper Rifle is manufactured by the Preci-sion Weapons Section (PWS), Weapons Training Battalion, Marine Corps Combat Development Center, 27251 GarandRoad, Quantico, VA 22134-5036.

ISSUE AND RECOVERY OF INDIVIDUAL WEAPONS 0001 00

The M40A3/A5 will be issued and recovered in the same manner as other individual weapons. NAVMC 10576, Memo-randum Receipt for Individual Weapons and Accessories, will be used as the issue document. NAVMC 10520, Weapon Cus-tody Receipt Card, will be used when the weapon is drawn from the armory for use. Detailed instructions for using these formsare contained in TM 4700-15/1_, Ground Equipment Record Procedures.

REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS 0001 00

If a way to improve this weapon is recognized, submit SF Form 368, Product Quality Deficiency Report (PQDR) inaccordance with MCO 4855.10, Product Quality Deficiency Report (PQDR) to the below listed address. To electronically sub-mit a PQDR, go to EZ PQDR website https://199.208.242.174/spqdr/home.do. This site can be used to submit the PQDR,answer questions on how to correctly fill out the form, and track the status.

Marine Corps LogCom Command Element Attn: Quality Assurance Office (L15)814 Radford Boulevard, Ste 20330 Albany, Georgia 31704-0330

CORROSION PREVENTION AND CONTROL

The prevention of corrosion on any equipment is important, and it is critically important for safe functioning of a weap-ons system. Carry out corrosion prevention in accordance with TM 4795-12/1_, Organizational Corrosion Prevention andControl Procedures for USMC Equipment. Report a recurrent corrosion problem on SF Form 368 in accordance with MCO4855.10.

DEPOT MAINTENANCE 0001 00

All depot repairs will be accomplished by Weapons Training Battalion, Quantico, Virginia, through a Depot Mainte-nance Intraservice Support Agreement with Marine Corps Logistics Bases, Albany, Georgia. In the event the weapon requiresdepot repair, ship it as a complete assembly.

FORMS, RECORDS, AND REPORTS 0001 00

The Marine Corps forms and procedures used for equipment maintenance will be those prescribed by the current editionof TM 4700-15/1_. Work package 0029 00, References, lists specific forms to be used with the M40A3/A5 Sniper Rifle, but isnot to be considered all-inclusive. Responsibility for the proper execution of forms and records rests with the using unit. Inorder to maintain accurate records, it is imperative that the units follow these instructions: 1. NAVMC 1018, Inspection Tag. This form will be attached to each M40A3/A5 Sniper Rifle that requires repair. The

instructions for completing this form are found in TM 4700-15/1_.

2. NAVMC 10558A, Weapon Record Book, Part II. This form is the most important of the three forms used with theM40A3/A5 Sniper Rifle and must be filled out according to the paragraphs below. Each M40A3/A5 Sniper Rifle, whenreceived from the supply system, will have a NAVMC 10558A attached. Receiving units verify the serial number of theweapon with the serial number recorded on the front of the weapon record book to ensure they are identical. TheNAVMC 10558A must be filled out in the following manner, without reference to any other publications:

a. Front Cover. The manufacturer will have filled out this page. No further entries will be made on it.

0001 00-1

TM 05539-IN

GENERAL INFORMATION - CONTINUED 0001 00

FORMS, RECORDS, AND REPORTS - CONTINUED

b. Page 3. The using unit will complete this page when the weapon is received. The only further entries required arethe telescope serial number, if replaced. The accumulated rounds fired count should be recorded from the previousWeapon Record Book, when replaced.

c. Page 5, Unit Commander’s Record. Record the daily total of rounds fired. Make entries as shown in Table 1.

NOTE

Add totals on page when current page is used in full.

d. Pages 40 through 49, Pullover Gage Inspection Record. Pages are left blank; do not use.

e. Page 51, Bore Inspection Record. This record contains all of the maintenance data performed by Organizationaland higher level maintenance. The telescope serial number entry will be made in the Weapon Record Book wheninitially received. Entries will be made as shown in the Bore Inspection Record on page 3 of this work package.

f. Lost, Destroyed or Misplaced Weapon Record Book. In the event a Weapon Record Book must be recon-structed, a Limited Technical Inspection (LTI) at the intermediate maintenance activity must be performed by anMOS 2112. Request assistance in recovering data from the address below.

Commanding Officer Weapons Training Battalion Marine Corps Combat Development Center 27251 Garand Road Quantico, VA 22134-5036 Attn: Precision Weapons Section

g. Accidents and Malfunctions Reports. Report accidents involving injury to personnel or damage to equipment inaccordance with the current edition of MCO 5101.8, Ground Mishap Report. Report explosive and ammunitionmalfunctions in accordance with MCO 8025.1, Class V (W) Malfunctions and Deficiencies.

Table 1. Weapon Record Book (Round Count).

COMMANDER'S RECORD

1. DATE

2.TYPE OF ROUND

3.ZONE

4.NO. OF ROUNDS EFC

VALUE

24 MAY 2000 M118 Range 4 30

28 MAY 2000 M118 Range 4 35

12 JUN 2000 M118 Range 4 35

23 JUN 2000 M118 Range 4 30

PAGE TOTAL 5. 130

TOTAL FROM PREVIOUS PAGE 6. 280

ACCUMULATIVE TOTAL 7. 410

0001 00-2

TM 05539-IN


FORMS, RECORDS, AND REPORTS - CONTINUED

M40-001

0001 00-3

TM 05539-IN


LIST OF ABBREVIATIONS/ACRONYMS 0001 00ABBREVIATION/ACRONYM DEFINITION

CAGEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Commercial and Government Entity CodeCLP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cleaner, Lubricant, and PreservativeFPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Feet Per Secondft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Foot/FeetIAW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . In Accordance WithIMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intermediate Maintenance Activityin.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .InchLAW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lubricant, arctic, weaponslb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PoundLSA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lubricant, small armsLSA-T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Lubricant, small armsLTI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Limited Technical Inspectionm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Metermm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MillimeterMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Modification InstructionMOA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minute of AngleNATO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .North American Treaty OrganizationNm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Newton MeterNSN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . National Stock Numberoz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OuncePQDR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Quality Deficiency ReportPMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preventive Maintenance Checks and ServicesRBC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rifle Bore CleanerSMR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Source, Maintenance, and RecoverabilityTB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Technical BulletinTDC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Top Dead Centeryd. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yard

END OF WORK PACKAGE

0001 00-4

TM 05539-IN

8

EQUIPMENT DESCRIPTION AND DATA 0002 00

DESCRIPTION 0002 00

General. The M40A3/A5 Sniper Rifle is a bolt action, manually operated, magazine fed, air cooled, shoulder firedweapon with an optical sight. The closed bolt design of the weapon offers a high degree of accuracy and control while provid-ing a greater degree of safety. The M40A5 is also equipped with a barrel muzzle break and quickly attachable/detachablesound suppressor.

NOMENCLATURE 0002 00

1. Left Side. The left side of the weapon reveals telescope and ring assembly (2), SIMRAD mount (3), optical platform(4), recoil pad inserts (5), recoil pad (6), swivel bosses (7), trigger guard (8), magazine assembly (9), fiberglass stock(10), front swivel boss, and accessory rail (1).

2. Right Side. The right side view of the weapon reveals cheek piece (11), cheek piece screws (12), bolt assembly (13),safety, barrel (14), swivel bosses (7), bipod assembly (15), bipod pod lock (16), receiver (17), magazine release (18),and trigger assembly (19).

M40-002

7

6

12 3

45

87

10

9

M40-003

7

7

14

1716

1819

1211

15

13

0002 00-1

TM 05539-IN

EQUIPMENT DESCRIPTION AND DATA - CONTINUED 0002 00

DESCRIPTION OF MAJOR COMPONENTS 0002 00

1. The major components of the M40A3/A5 are barrel and receiver assembly (14 and 17), bolt assembly (13), stock assem-bly (10), trigger guard (8), magazine assembly (9), telescope assembly (2), accessory rail (1), bipod assembly (15), andoptical platform (4).

2. Barrel and Receiver Assembly. The receiver (17) connects to the barrel (14), trigger (19), and safety mechanism (20)into a single unit. The optical platform (4), telescope assembly (2), and trigger guard (8) are components of the barreland receiver assembly (14 and 17). The M40A5 is also equipped with a muzzle break to facilitate the quickly attached/detached sound suppressor.

M40-004

2

134

8

9

15

14

10

17

1

M40-005

2

20

19

4 14

17

8

0002 00-2

TM 05539-IN


DESCRIPTION OF MAJOR COMPONENTS - CONTINUED

3. Bolt Assembly. The bolt assembly (13) is housed in the receiver (17). The bolt feeds and fires the cartridge and extractsand ejects the empty cartridge case after firing.

4. Stock Assembly. The fiberglass stock (10) contains the trigger guard (8), magazine assembly (9), and supports the bar-rel (14), and receiver assembly (17). Quick detachable sling swivels (21), recoil pad assembly (6), and cheek pieceassembly (11) are attached to the stock.

M40-00617

13

M40-007

1714

10

11

6

21

89

21

0002 00-3

TM 05539-IN



5. Trigger Guard. The trigger guard assembly (8) helpsprotect the trigger assembly.

6. Magazine Assembly. The magazine assembly (9)consists of the follower (22), magazine spring (23),and floor plate (24).

7. Telescope Assembly with Ring Mounts. The tele-scope assembly (2) is mounted to the optical platform(4). The telescope provides a 3-12 X 50 view of thetarget. It has a ballistic elevation cam that adjusts thepoint of aim/point of impact out to 1,000 yards in 100yard increments.

M40-008

8

M40-028

9 23

22

24

M40-009

4

2

0002 00-4

TM 05539-IN



8. Bipod Assembly. The bipod assembly (15) ismounted to the stock. It can be used to help stabilizethe weapon system in certain tactical situations. Thebipod assembly pivots and locks in any left or rightposition.

9. Optical Platform. The ring mounts (25) attach to the optical platform (4) that supports the telescope assembly (2). Theoptical platform is designed to accommodate various optics.

M40-010

15

M40-011

252

4 25

0002 00-5

TM 05539-IN



10. Muzzle Break. (M40A5 Only) - The muzzle break (26) is attached to the weapon’s barrel (14) for the purpose of pro-viding a mounting point for a sound suppressor (28). The bearing surfaces and interface notch on the muzzle break pro-vide a highly precise fit between the suppressor and the muzzle break. The muzzle break also incorporates a flashsuppressor (27) to reduce muzzle flash of the weapon when the suppressor is not being used.

11. Sound Suppressor. (M40A5 Only) - The suppressor (28) is a lightweight, quickly attachable/detachable unit that isdesigned to reduce both the audible report and muzzle flash of the M40A5 weapon when fired. The suppressor is madeof high temperature alloys and stainless steel. The suppressor fits over the barrel muzzle break (26) riding on bearingsurfaces that provide a precise fit. The suppressor then locks securely into place by use of a locking ring (30) equippedwith a ratchet stop (29).

AMMUNITION 0002 00

WARNING Use only authorized ammunition manufactured to U.S. NATO specifications.

Primary Round. The primary round for the M40A3/A5 is the 7.62 mm, M118LR cartridge.

ASSOCIATED EQUIPMENT 0002 00Refer to the Supply System Responsibility Items (SSRI) List in TM 05539-OR_ for a list of the associated equipment.

M40-077

2726 28

14 30 29 28

0002 00-6

TM 05539-IN


REFERENCE DATA 0002 00

END OF WORK PACKAGE

Table 1. M40A3/A5 Sniper Rifle Specifications.

SPECIFICATIONS

Caliber 7.62 mm NATO

Weight w/o suppressor w/ suppressor

16.05 lb17.20 lb

Weight of telescope 2.0 lb

Total weight w/o suppressorw/ suppressor

18.25 lb19.45 lb

Overall lengthw/o suppressorw/ suppressor

44 in.49.75 in.

Barrel length 24 in.

Suppressor weight 19 oz

Suppressor length 9.8 in.

Suppressor diameter 1.5 in.

Magazine capacity 5 rounds

Safety Manual lever

Rifling 1 turn in 12 inches, right hand twist

Chamber pressure 50,000 copper units of pressure (cup)

Stock Fiberglass

Telescope 3-12 X 50, point of aim/point of impact

Telescope length 12.5 in.

Windage Adjustable in .1 mil increments

Elevation Adjustable in .1 mil increments

CAPABILITIES

Modes of fire Bolt action, manually operated

Maximum effective range 1,000 yd

Muzzle velocity 2,670 feet per second with M118LR ammunition (slight increase w/suppressor)

0002 00-7/(0002 00-8 Blank)

TM 05539-IN

2

PRINCIPLES OF OPERATION 0003 00

GENERAL DESCRIPTION

1. Cycle of Operation. Knowledge of what happens during the cycle of operation will help the operator understand thecause of and remedy for various stoppages.

2. Eight Steps. The cycle of operation consists of eight steps:

a. Firing

b. Unlocking

c. Cocking

d. Extracting

e. Ejecting

f. Feeding

g. Chambering

h. Locking

3. Description of Eight Steps. These eight steps are explained below, including a brief description of what occurs insidethe weapon during each step. Assume that a full magazine is loaded in the weapon, that the first cartridge is chambered,and that the bolt is forward and locked.

a. Firing. The trigger with attached connector pivots on the trigger pin, allowing the sear safety cam to drop downand release the firing pin. The firing pin under spring tension is propelled forward to strike the primer of the car-tridge. The primer ignites the powder inside the cartridge case and gas pressure builds. The building gas pressureexerts thrust on the face of the bullet, pushing it against the lug abutments while propelling the bullet down and outof the bore at the same time.

b. Unlocking. After firing, the operator starts to rotate the bolt handle up, which unlocks the bolt from the breech.

c. Cocking. When the bolt handle is lifted, the firing pin cap is cammed into the notch of the bolt body.

d. Extracting. The bolt handle, while still beinglifted, contacts the primary extraction surface onthe rear of the receiver, which provides mechani-cal leverage to initially break the seal of the car-tridge inside of the chamber and start therearward movement of the bolt to the rear. Theextractor (1), being engaged with the extractionrim of the cartridge case, pulls the spent casefrom the chamber.

e. Ejecting. The bolt, while continuing its rearwardmotion in the receiver, continues to pull the spentcartridge case until it clears the ejection port. Assoon as the spent cartridge clears the ejectionport, it is expelled from the weapon by the ejec-tor (2), which is under spring tension. The boltcontinues to the rear until it makes contact withthe bolt stop inside the receiver.

M40-20032

1

0003 00-1

TM 05539-IN

PRINCIPLES OF OPERATION - CONTINUED 0003 00

GENERAL DESCRIPTION - CONTINUED

f. Feeding. While pushing the bolt handle forward into battery, a live cartridge is stripped from the magazine by thenose of the bolt. The live cartridge is guided toward the chamber by the feed ramp of the receiver.

g. Chambering. The bolt continues the forward movement of the live cartridge toward the breech until the bolt handle(3) makes contact with the primary extraction surface of the receiver. At this point the bolt starts to rotate down-ward, the extractor snaps over the extraction rim of the cartridge case, and the bolt lugs (4) rotate into the breech.

NOTEDirt or debris inside the chamber, as well as bent, dented, or otherwise faulty ammunition can preventa cartridge from fully chambering or extracting.

h. Locking. While the bolt (3) continues rotatinginside the breech, the bolt lugs (4) start engagingand locking into the receiver’s lug abutments.The bolt is locked once it is fully closed into bat-tery. At this point the weapon is again ready forfiring.

END OF WORK PACKAGE

M40-2004

3

4

0003 00-2

TM 05539-IN

CHAPTER 2TROUBLESHOOTING

TM 05539-IN

2

TROUBLESHOOTING INTRODUCTION 0004 00

GENERAL

This chapter contains troubleshooting information for locating and correcting malfunctions that may occur with theM40A3/A5 Sniper Rifle.

This manual cannot list all of the possible malfunctions, tests or inspections, and corrective actions for the M40A3/A5.If a malfunction is not listed (except when the malfunction and cause are obvious) or if it is not corrected by the listed action,evacuate the weapon to the next higher level of maintenance. Table 1, in Troubleshooting Procedures (WP 0006 00), lists pos-sible malfunctions, tests or inspections, and corrective action for troubleshooting the M40A3/A5 at the Organizational andIntermediate maintenance level.

END OF WORK PACKAGE

0004 00-1/(0004 00-2 Blank)

TM 05539-IN

2

TROUBLESHOOTING SYMPTOM INDEX 0005 00

TROUBLESHOOTING PROCEDURES

This symptom index is provided for a quick reference of the malfunctions covered in Table 1, Organizational and Inter-mediate Troubleshooting Chart (WP 0006 00).

Malfunction/Symptom Troubleshooting Procedure Page

1. Magazine Inserts with Difficulty.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-12. Magazine Cannot be Retained in Weapon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-13. Failure to Feed (Bolt Moves Forward Without Feeding Cartridge). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-14. Bolt Fails to Lock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-15. Failure to Chamber. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-26. Failure to Cock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-27. Failure to Fire. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-28. Failure to Extract (Cartridge Case Will Not Extract). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-29. Failure to Eject (Cartridge Case Will Not Eject). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-210. Bipod Fails to Clamp or Lock Securely. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-211. Bipod Legs Fail to Expand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-212. Bipod Legs Fail to Remain Open. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-2

END OF WORK PACKAGE

0005 00-1/(0005 00-2 Blank)

TM 05539-IN

2

TROUBLESHOOTING PROCEDURES 0006 00

GENERAL

Table 1 lists possible malfunctions, tests or inspections, and corrective action for troubleshooting the M40A3/A5 SniperRifle at the Organizational and Intermediate Maintenance level.

Table 1. Organizational and Intermediate Troubleshooting Chart.

MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION

1. Magazine Inserts with Difficulty.

1. Check for bent or deformed magazine. Replace magazine.

2. Check for excessive dirt in receiver well or inmagazine.

Clean and lubricate receiver well and magazine. Refer to TM 05539-OR_.

3. Check for ammunition not fully seated inmagazine.

Remove ammunition and reload properly. Refer to TM 05539-OR_.

2. Magazine Cannot be Retained in Weapon.

1. Check for magazine not fully seated. Remove and install magazine properly. Ensure the latch clicks.

2. Check for magazine damaged or deformed. Replace magazine.

3. Check for deformed locking recess at topfront of magazine.

Replace magazine.

3. Failure to Feed (Bolt Moves Forward Without Feeding Cartridge).

1. Check for magazine improperly loaded.

2. Check for weak or broken magazine spring.3. Check for defective/dirty magazine.4. Check for damaged or dirty ammunition.

Re-insert ammunition properly. Refer to TM 05539-OR_. Replace magazine. Clean or replace magazine as necessary.Clean or replace ammunition. Refer to TM 05539-OR_.

4. Bolt Fails to Lock. 1. Check for ammunition not seated in chamberproperly.

Ensure ammunition is seated fully into chamber.

2. Check for dirty breech/chamber. Clean breech/chamber as necessary. Refer to TM 05539-OR_.

3. Check for defective extractor. Replace defective extractor. Refer to WP 0013 00.

4. Check for damaged/dirty bolt assembly. Clean and lubricate or repair bolt assembly as necessary. Refer to TM 05539-OR_.

5. Check for damaged receiver. Evacuate to higher level of maintenance.

6. Check for defective ejector. Evacuate to higher level of maintenance.

7. Check for damaged/defective bolt. Evacuate to higher level of maintenance.

0006 00-1

TM 05539-IN

TROUBLESHOOTING PROCEDURES - CONTINUED 0006 00

END OF WORK PACKAGE

5. Failure to Chamber.

1. Check for dirty/defective ammunition. Clean ammunition with dry cloth or replace. Refer to TM 05539-OR_.

2. Check for dirty chamber. Clean barrel and chamber. Refer to TM 05539-OR_.

6. Failure to Cock. Check for defective/dirty trigger and sear assembly.

Clean or repair trigger and sear assembly as necessary. Refer to WP 0024 00.

7. Failure to Fire. 1. Check for empty magazine. Load magazine. Refer to TM 05539-OR_.

2. Check for weapon on SAFE. Move safety selector lever to FIRE. Refer to TM 05539-OR_.

3. Check for open bolt or bolt not fully closed. Close bolt fully. Refer to TM 05539-OR_.

4. Check for defective firing pin. Replace firing pin as necessary. Refer to WP 0014 00.

5. Check for faulty ammunition. Replace ammunition and report lot number. Refer to TM 05539-OR_.

6. Check for defective bolt assembly. Evacuate to higher level of maintenance.

7. Check for defective firing mechanism. Evacuate to higher level of maintenance.

8. Failure to Extract (Cartridge Case Will Not Extract).

1. Check for bent, frozen, or dirty extractor orbolt assembly.

2. Ruptured or damaged ammunition inchamber.

Remove, clean and replace extractor or bolt assembly as necessary. Refer to WP 0013 00. Remove ammunition or defective case.

9. Failure to Eject (Cartridge Case Will Not Eject).

1. Check for defective/dirty ejector, ejectorspring, or bolt assembly.

2. Check for damaged extractor or extractorspring.

Clean or repair ejector, ejector spring or bolt assembly as necessary. Refer to WP 0023 00. Replace damaged extractor or extractor spring as necessary. Refer to WP 0023 00.

10. Bipod Fails to Clamp or Lock Securely.

1. Check for heavy accumulation of foreignmaterial.

2. Check for locking screw not secure.

Evacuate to higher level of maintenance.

Tighten locking screw as required. Refer to TM 05539-OR_.

11. Bipod Legs Fail toExpand.

Check for bent housing. Replace bipod. Refer to TM 05539-OR_.

12. Bipod Legs Fail toRemain Open.

Check for missing or defective extension springs.

Replace bipod. Refer to TM 05539-OR_.

Table 1. Organizational and Intermediate Troubleshooting Chart - Continued.

MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION

0006 00-2

TM 05539-IN

CHAPTER 3ORGANIZATIONAL MAINTENANCE

TM 05539-IN

2

SERVICE UPON RECEIPT 0007 00

SERVICE UPON RECEIPT

Service the weapon upon receipt. Perform limited technical inspection in accordance with the Quality Assurance Check-list in WP 0033 00 of this manual.

END OF WORK PACKAGE

0007 00-1/(0007 00-2 Blank)

TM 05539-IN

6

PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INCLUDING LUBRICATION INSTRUCTIONS 0008 00

GENERAL

This work package contains inspection, disassembly and reassembly procedures required for corrective maintenance onthe M40A3/A5 Sniper Rifle.

1. Organizational Maintenance. Organizational Maintenance is performed at the using unit beyond the capabilities of theoperator as identified in TM 05539-OR_. Organizational Maintenance is authorized to remove the firing pin assemblyfrom the bolt body assembly and the receiver assembly from the stock for the purpose of inspecting, repairing or clean-ing. The Repair Parts List (RPL) in WP 0035 00 contains Organizational Maintenance special tools. For all otherinspections and repairs, evacuate the M40A3/A5 Sniper Rifle to the Intermediate Maintenance Activity (IMA).

2. Special Tools. The Repair Parts List (RPL) contains the special tools required in the small arms technician’s toolbox. Aqualified MOS 2112 (Precision Weapons Repairman) will replace weapon components. Either a qualified MOS 2112 ora MOS 2171 (Optical Instrument Repairman) may repair and replace the telescope.

3. Intermediate Through Depot Maintenance. Intermediate Maintenance repairs include the total replacement of thetelescope, the telescope optical platform, the trigger assembly, the bolt stop, and the safety selector lever. Higher levelmaintenance will be done by a MOS 2112. Depot Maintenance is performed by Weapons Training Battalion, Quantico,VA, which also functions as the weapons rebuild facility. Weapons Training Battalion is responsible for rebarreling theweapon, replacing the stock assembly, and replacing the bolt body assembly.

PREVENTIVE MAINTENANCE PROCEDURES

1. Organizational Preventive Maintenance Checks and Services. Perform PMCS every 90 days to keep the weapon inproper operating condition, in accordance with the Quality Assurance Checklist in WP 0033 00 of this manual. If theweapon has not been used in 90 days, consider placing it in storage according to instructions outlined in TM 05539-OR_. If rust is observed on a weapon, perform PMCS immediately.

2. Inspection. Perform the following inspections in accordance with TM 05539-OR_. Field strip the weapon; inspect allparts for cracks, dents, burrs, excessive wear, rust, or corrosion; and ensure all items are cleaned and lubricated. Evacu-ate the weapon to higher level of maintenance if repairs are not authorized at the Organizational Maintenance level. SeeSource, Maintenance, and Recoverability (SMR) codes in WP 0035 00, Repair Parts List (RPL).

The using unit is responsible for organizational preventive maintenance. The phase consists of inspecting, servicing,lubricating, and adjusting parts.

CLEARING/UNLOADING THE WEAPON

WARNING• Ensure fingers are outside the trigger guard. Keep the weapon pointed in a safe direction at all times.

• After unloading the weapon and with the bolt open, visually and physically check the chamber forammunition.

• Always assume every weapon is loaded until it is determined through visual and physical inspection thatit is not. Procedures for clearing/unloading the weapon are outlined in TM 05539-OR_.

• Failure to follow these warnings may cause injury or death to personnel.

FIELD STRIPPING THE WEAPON

The weapon is field stripped into three major groups to clean, inspect and repair. The groups are the bolt assembly, bar-rel and receiver assembled into the stock assembly (A5 models also include the suppressor), and magazine assembly. Proce-dures for field stripping the weapon are outlined in TM 05539-OR_.

0008 00-1

TM 05539-IN

PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INCLUDING LUBRICATION INSTRUCTIONS - CONTINUED 0008 00

INSPECTING THE WEAPON

NOTEA MOS 2111 (Small Weapons Repairman) must be trained by a MOS 2112 (Precision WeaponsRepairman) on procedures prior to performing a limited technical inspection (LTI) or a pre-fireinspection (PFI).

Inspections reveal the need for repairs, cleaning, or lubrication. When the using unit armory initially receives theweapon, the MOS 2112 (Precision Weapons Repairman) will perform a Limited Technical Inspection (LTI) to verify theweapon’s serviceability. In order to ensure that every operator is provided a safe, serviceable and accurate weapon, allM40A3/A5 Sniper Rifles will receive periodic inspections. 1. Limited Technical Inspection.

a. A MOS 2111 will conduct a pre-fire inspection (PFI) that is good for 30 days from the date of inspection. (Conductthe inspection in accordance with TI 8005-24/20_, Pre-fire Inspection, Small Arms Weapons, Ordnance Materieland Trigger Pull Measurement Small Arms Weapons).

b. A MOS 2111 will conduct quarterly Preventive Maintenance Checks and Services (PMCS) every 90 days in accor-dance with Table 1 of this work package. Any weapon not repairable at Organizational Maintenance will be evac-uated to a higher level of maintenance for further evaluation or repair.

c. A MOS 2112 will conduct semi-annual inspections every 180 days in accordance with this work package. d. Reserve units will inspect at the same frequency, except the semi-annual inspection will not be required and weap-

ons will be inspected annually by a qualified MOS 2112 at the Reserve IMA.2. Weapons in Use. A weapon in use and subject to the elements requires no inspection for cleanliness since its use and

exposure is sufficient evidence that it requires repeated daily cleaning and lubrication. Combine daily cleaning with theunit armorer’s inspection program for damage detection and maintenance repairs. Evacuate to next higher level of main-tenance if necessary.

ORGANIZATIONAL TOOLS AND EQUIPMENT

Tools and equipment listed in the Repair Parts List are authorized at the Organizational Maintenance level for the propercare and cleaning of the weapon.LUBRICATING THE WEAPON

CAUTIONUse only authorized lubricants. DO NOT mix lubricants.

Lubricate the weapon in accordance with TM 05539-OR_ and TM 9150-15/1_, Military Use of Cleaner, Lubricant, Pre-servative (CLP) for Weapons and Support Equipment.

0008 00-2

TM 05539-IN


INTERMEDIATE PREVENTIVE MAINTENANCE CHECKS AND SERVICES

A MOS 2112 conducts a semi-annual inspection at the Intermediate Maintenance Activity (IMA). Conduct the inspec-tion in accordance with the instructions outlined in this work package.

Table 1. Intermediate Preventive Maintenance Checks and Services (PMCS) Quarterly Schedule.

ITEM INSPECTED PROCEDURE/CONDITIONS

General

Sniper Rifle 1. Field strip the weapon in accordance with TM 05539-OR_.2. Disassemble the weapon as needed in accordance with WP 0012 00.3. Inspect all parts for cleanliness. Imperfections to the overall finish of the scope, rifle,

and stock do not meet criteria for evacuation.

Serial Numbers 1. Check that the last four digits of the weapon’s serial number match the serialnumbers on the bolt handle, trigger guard, and stock.

2. These parts are not interchangeable with any other weapons.

Weapon Record Book 1. Ensure that the Weapon Record Book (Part II, Tube Data) accompanies the weapon.2. Calculate and verify all round count entries for correctness.

Scope 1. Check that the elevation, windage, parallax, and reticle brightness knobs move freelyin both directions with distinct clicks.

2. Inspect lenses for scratches, pits, or chips that interfere with the field of view.Scratches, pits, or chips are acceptable as long as they are not in the direct field ofview.

3. Ensure optical platform for the telescope is securely fastened and that all four screwsare present.

4. If any of the above problems exist, evacuate to higher level of maintenance forrepairs. Imperfections to the overall finish of the scope do not meet criteria forevacuation.

0008 00-3

TM 05539-IN


INTERMEDIATE PREVENTIVE MAINTENANCE CHECKS AND SERVICES - CONTINUED

Table 1. Intermediate Preventive Maintenance Checks and Services (PMCS) Quarterly Schedule - Continued.


Scope Assembly

Scope Rings 1. Ensure scope rings are firmly attached to the optical platform and the scope itself issecure inside the scope rings.

NOTEUnless the scope is repaired or replaced at the IMA, there should be noreason to move or disturb the scope inside the scope rings; this mayaffect the weapon’s zero, horizontal, and vertical alignment of the scopeto the weapon.

2. Adjustment of the scope inside the scope rings is not authorized at the OrganizationalMaintenance level. However, the Organizational Maintainer (OM) may adjust thescope assembly (rings attached) for eye relief along the axis of the optical platform(rail). Retorque to 65 lb-in.

Stock Assembly

Stock Assembly 1. Inspect the stock for cracks and overall serviceability. Pay special attention to thebridge.

2. Check to ensure that the sling swivel sockets are serviceable and secure within thestock.

3. Ensure that the recoil pad assembly is serviceable and the recoil pad is not frayed,excessively worn, or lose.

4. Inspect the cheek piece and cheek piece screws for serviceability.5. Inspect the bipod stud to ensure that it is serviceable, tight and aligned properly.6. Inspect the bedding to be sure that it is free of oil, dirt, and debris. Wipe clean the

bedding surfaces as necessary using acetone or denatured alcohol; do not scratch orotherwise damage the bedding.

7. If any of the above items are missing, worn, or unserviceable, repair as authorizedor evacuate to higher level of maintenance.

Trigger Guard

Magazine Assembly 1. Inspect the trigger guard assembly for serviceability. 2. Inspect the magazine follower and follower spring for serviceability. Ensure spring

seats correctly in floor plate.3. If any of the above items are missing, worn, or unserviceable, evacuate to higher

level of maintenance.

0008 00-4

TM 05539-IN





Barrel and Receiver Assembly

1. Inspect the barrel for bulges, burrs, obstructions, or pits in the chamber or bore. Referto WP 0016 00.

2. Inspect the muzzle end of the barrel for a serviceable crown; the lands and groovesshould have no nicks or burrs. If any of the above problems exist, evacuate to higherlevel of maintenance for repairs.

3. (M40A5 only) Inspect the muzzle break for looseness, cracks, and/or damage.Replace muzzle break as necessary and re-zero weapon with and without suppressor.

4. Ensure the stock’s bedding surfaces are clean and oil free. Place the stock topsideup in a padded vise.

5. Carefully insert the recoil lug of the barrel and receiver assembly straight into thelug mortise inside the stock.

6. Assemble trigger guard and place on stock.

NOTEWhen installing the trigger guard screws, ensure that the short screwgoes into the hole in the front portion of the trigger guard. The longscrew goes into the rear hole next to the trigger guard bow.

7. Install forward trigger guard screw first, then the rear screw. Tighten both screwsby hand.

8. Review the Weapon Record Book for the latest torque setting. Both trigger guardscrews are torqued at the same setting.

9. Using an -in.-lbs. torque wrench, set proper torque for the weapon in accordancewith the Weapon Record Book and then torque the trigger guard screws; front screwfirst, then the rear screw. Do not over-torque or under-torque these screws, as theweapon’s accuracy will be affected.

Bolt Assembly

Bolt 1. Inspect the face of the bolt and bolt lugs for cracks, chips, or pitting. Evacuate tohigher level of maintenance for repairs.

2. Check headspace. Refer to WP 0023 00.

Extractor 1. Ensure extractor is securely in place and functioning properly inside the bolt face.2. The extractor should have spring tension and return to position after being depressed.

Extractor should not be chipped, worn, or fouled with brass chips. If any problemsexist, evacuate to higher level of maintenance for repairs.

Ejector 1. Check ejector for proper spring tension. 2. Depress the ejector; it should depress slightly below bolt face and fully return when

released. If any problems exist, evacuate to higher level of maintenance for repairs.

0008 00-5

TM 05539-IN



END OF WORK PACKAGE



Bolt Assembly - Continued

Firing Pin Assembly 1. Using the bolt disassembly tool, disassemble the bolt (WP 0013 00) and remove thefiring pin assembly from the bolt.

2. Inspect the firing pin for cleanliness and proper lubrication.

CAUTIONDO NOT use grease on the firing pin spring as this could cause misfiresin cold weather.

3. Ensure firing pin is straight and has a smooth, round tip. Refer to WP 0014 00.4. Lightly coat threads of bolt plug with grease and then reassemble the firing pin

assembly into the bolt. 5. Gage firing pin protrusion using the firing pin protrusion gage. Refer to WP 0013 00.6. Ensure assembly is screwed all the way into the bolt and that the cocking leg lines

up with the small notch on the back of the bolt.

Safety

Safety 1. Check the safety for proper functioning.2. With the bolt cocked and weapon on “SAFE”, the rifle should not fire. If any

problems exist, evacuate to higher level of maintenance for repairs. No repairs oradjustments are authorized at the Organizational Maintenance level.

Bipod Assembly

Bipod 1. Inspect bipod assembly for function and cleanliness.2. Legs should extend, hold, and retract properly.3. Bipod should pivot both left and right and be able to lock in any position with the

pod lock. No repairs are authorized for the bipod assembly. If damaged, replace theentire bipod assembly.

Function Check

1. Reassemble the remaining weapon system components, if any.2. Perform the function check outlined in WP 0020 00. If the weapon does not function

properly and the cause cannot be determined by using the troubleshooting chart,evacuate to higher level of maintenance for repairs.

0008 00-6

TM 05539-IN

4

GENERAL MAINTENANCE INSTRUCTIONS 0009 00

THIS WORK PACKAGE COVERS

ScopeWork SafetyGeneral InformationCleaning InstructionsInspection Instructions

Repair InstructionsLubrication InstructionsStandard Tool RequirementsApplying TorqueTagging Instructions

INITIAL SETUP

Maintenance LevelOrganizational

ReferencesTM 4750-OD/1A_TM 9-247_WP 008 00

SCOPE 0009 00

These general maintenance instructions contain general shop practices and specific methods you must be familiar withto properly maintain the M40A3/A5 Sniper Rifle.

WORK SAFETY 0009 00

1. Before starting a task, think about the risks and hazards to your safety as well as that of others. Wear protective gearsuch as safety goggles or lenses, safety shoes, rubber apron, or gloves. Protect yourself against injury.

2. Observe all WARNINGs, CAUTIONs, and NOTEs.

GENERAL INFORMATION 0009 00

1. Before beginning a task, find out how much repair, modification, or replacement is needed to repair the weapon asdescribed in this manual. Sometimes the reason for equipment failure can be seen right away and complete teardown isnot necessary. Disassemble the weapon only as far as necessary to repair or replace damaged or broken parts.

2. All tags and forms attached to the equipment must be checked to learn the reason for removal from service. Check allModification Instructions (MIs) and Technical Bulletins (TBs) for equipment changes and updates.

3. In some cases a part may be damaged by removal. If the part appears to be good, and other parts behind it are not defec-tive, leave it on and continue the procedure.

0009 00-1

TM 05539-IN

GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED 0009 00

CLEANING INSTRUCTIONS 0009 00

WARNING• Use only Cleaner, Lubricant, and Preservative (CLP) for cleaning and lubrication of the M40A3/A5

Sniper Rifle in all but the most severe conditions.• Improper cleaning methods and use of unauthorized cleaning solvents may injure personnel and dam-

age equipment. Refer to TM 9-247_, Materials Used for Cleaning, Preserving, Abrading, and CementingOrdnance Materiels and Related Materiels Including Chemicals, for correct information.

• Cloths or rags saturated with solvent cleaning compound must be disposed of IAW authorized facilities’procedures.

• Eye shields must be worn when cleaning with a wire brush. Flying rust and metal particles may causeinjury to personnel.

• Particles blown by compressed air are hazardous. Use a maximum of 30 psi (207 kPa) when cleaningcomponents. DO NOT exceed 15 psi (103 kPa) nozzle pressure when drying parts with compressed air.DO NOT direct compressed air against human skin. Make sure air stream is directed away from userand other personnel in the area. To prevent injury, user must wear protective goggles or face shield.

a. Cleaning instructions are the same for the majority of the parts and components of theweapon.

b. The importance of cleaning must be thoroughly understood by maintenance personnel.Great care and effort are required in cleaning. Dirt and foreign material are a constantthreat to satisfactory maintenance. The following should apply to all cleaning, inspection,repair, and assembly operations:(1) Clean all parts before inspection, after repair, and before assembly.

(2) To prevent contamination, hands should be kept free of any accumulation of grease, which cancollect dust, dirt, or grit.

(3) After cleaning, all parts should be covered or wrapped to protect them from dust and dirt. Partsthat are subject to rust should be lightly oiled.

• Failure to follow these warnings may result in injury to personnel.1. Cleaning Disassembled Parts.

a. Place all disassembled parts in wire baskets for cleaning.b. Dry and cover all cleaned parts.c. Place parts on or in “racks” and hold for inspection or repair.d. All parts subject to rusting must be lightly oiled and wrapped.e. Keep all related parts and components together. Do not mix parts.

2. Castings.

a. Clean inner and outer surfaces of castings and all areas with CLP and/or bore solvent.

b. Use a stiff brush to remove sludge and gum deposits.

c. Clear out all tapped (threaded) holes with compressed air to remove dirt and solvent cleaning compound.

3. Machined Surfaces.

a. Clean machined surfaces with Cleaning compound, powder solvent (Item 8, WP 0030 00).

b. Dry surfaces with compressed air.

0009 00-2

TM 05539-IN


CLEANING INSTRUCTIONS - CONTINUED 0009 00

4. Mated Surfaces. Lightly coat with oil and wrap all parts subject to rust before storing.

INSPECTION INSTRUCTIONS 0009 00

1. General. All components and parts must be carefully checked to determine if they are serviceable for reuse, if they canbe repaired, or if they must be scrapped.

2. Drilled and Tapped (Threaded) Holes.

a. Inspect for wear, distortion (stretching), cracks, or any other damage in or around holes.

b. Inspect threaded areas for wear, distortion, or evidence of cross-threading.

3. Castings.

a. Inspect all ferrous and non-ferrous castings for cracks using a magnifying glass and strong light. Particularly checkareas around studs, pipe plugs, threaded inserts, and sharp corners. Replace all cracked castings.

b. Inspect machined surfaces for nicks, burrs, or raised metal. Mark damaged areas for repair or replacement.

c. Inspect all pipe plugs, pipe plug openings, screws, and screw openings for damaged or stripped threads.

d. Check all mating surfaces.

4. Studs, Bolts, and Screws. Replace if threads are damaged, bent, or stretched.

5. Machine-Tooled Parts. Inspect for cracks, breaks, elongated holes, wear, and chips. Replace any damaged parts.

6. Machined Surfaces. Inspect for cracks, evidence of wear, galled or pitted surface, burrs, nicks, and scratches.

7. Mating Surfaces. Inspect for seal, secure fit, and pitting.

8. Rusted Surfaces. Inspect for pitting, holes, and severe damage.

9. Internal Parts. Inspect for cracks, nicks, burrs, evidence of overheating, and wear.

10. Externally Exposed Parts. Inspect for breaks, cracks, rust damage, and wear.

11. Springs. Inspect for broken, collapsed, and twisted coils.

REPAIR INSTRUCTIONS 0009 00

1. General.

a. Any repair procedure specific to a particular part or component is covered in the work package relating to thatitem.

CAUTIONRepaired items must be thoroughly cleaned to remove metal chips and abrasives, to prevent themfrom entering working parts of the weapon. Failure to comply could cause damage to equipment.

b. After repair, clean all parts thoroughly.

2. Castings.

Only minor repairs to machined surfaces are permitted. Remove minor nicks, burrs, and scratches with:

a. Fine-mill file.

b. Crocus cloth dipped in solvent cleaning compound.

0009 00-3

TM 05539-IN


LUBRICATION INSTRUCTIONS 0009 00

Refer to PMCS (WP 0008 00) for detailed instructions on proper lubrication. The following are some general practicesto remember:

a. Use correct lubricant.b. Keep lubricants clean.c. Lubricate clean, disassembled, and new parts to prevent rust.

STANDARD TOOL REQUIREMENTS 0009 00

Some maintenance tasks may require special or fabricated tools. The initial setup of the procedure will specify any spe-cial or fabricated tools needed to perform that procedure. Use these special tools only for the maintenance procedures forwhich they are designed or called out. If you are unfamiliar with a required tool, see your supervisor.

APPLYING TORQUE 0009 00

If a unique torque value is required, it will be provided in a procedural step in the task.

TAGGING INSTRUCTIONS 0009 00

1. Use marker tags to identify all parts which may be hard to identify or replace later. Fasten tags to parts during removalby wrapping wire fasteners around or through parts and twisting ends together. Position tags out of the way duringcleaning, inspection, and repair. Mark tags with a pencil, pen, or marker.

2. Identify and tag other parts by name and installed location, as required.

END OF WORK PACKAGE

0009 00-4

TM 05539-IN

2

CLEANING THE WEAPON 0010 00


Cleaning

INITIAL SETUP


ReferencesTM 05539-OR_

Equipment ConditionsWeapon cleared (WP 0012 00)

CLEANING

CAUTIONDO NOT allow Cleaner, Lubricant, and Preservative (CLP) or any other solvent to come in contactwith the telescope lenses.

Cleaning is a vital part of organizational preventive maintenance. The weapon should be cleaned as soon as practicalafter firing and after each time it is exposed to field conditions or moisture. Use the procedures outlined in TM 05539-OR_.

END OF WORK PACKAGE

0010 00-1/(0010 00-2 Blank)

TM 05539-IN

0011 00-1/(0011 00-2 Blank)

MAGAZINE ASSEMBLY 0011 00


Inspection

INITIAL SETUP



WARNINGAlways assume every weapon is loaded until it is determined through visual and physical inspectionthat it is not. Procedures for clearing/unloading the weapon are outlined in WP 0012 00. Failure to fol-low this warning may cause injury or death to personnel.

INSPECTION

1. Check the fit of the magazine (2) with the bolt (1) closed. The magazine should insert, lock, and unlock easily.2. With the magazine (2) in place, pull the bolt (1) back to the rear. 3. Remove magazine (2).4. Replace magazine (2) if broken or damaged.

END OF WORK PACKAGE

1

2 M40-018

2

TM 05539-IN

4

DISASSEMBLY OF WEAPON 0012 00


Clearing and Unloading the Weapon, Field Stripping the Weapon

INITIAL SETUP

Maintenance Level

Organizational

References

WP 0016 00

CLEARING AND UNLOADING THE WEAPON

WARNING• Always assume that every weapon is loaded until it is determined through visual and physical inspection

that it is not.

• After unloading the weapon, and with the bolt handle to the rear, visually and physically check thechamber for ammunition.

• Failure to follow these warnings may result in injury or death to personnel from negligent discharge.

CAUTIONDO NOT leave rounds in the magazine for extended periods. The follower spring will lose tension andcause feeding malfunctions.

1. Procedure for Clearing the Weapon. a. On Safe. The safety lever located on the right side of the receiver is already rearward in the “SAFE” position. (The

weapon must be cocked before the safety lever can be pushed forward to the “FIRE” position).b. Remove the Magazine. Depress magazine release rearward until the magazine releases. Remove magazine assem-

bly.c. Unlock Bolt. Rotate the bolt handle upward and pull to the rear to unlock the bolt. Watch for live round or empty

cartridge to be ejected.d. Inspect Chamber. Inspect chamber for live round or empty cartridge. Visually inspect the chamber through the

ejection port. Physically inspect the chamber with finger to check for cartridge case. Remove any live round orempty cartridge from the chamber or from the magazine well.

FIELD STRIPPING THE WEAPON

Procedure for Field Stripping the Weapon. Field strip the weapon into its three major groups: Magazine Assem-bly, Bolt Body Assembly, and Barrel and Receiver Assembly. Leave the Barrel and Receiver Assembly attached to the stock assembly as one major group.

a. Magazine Disassembly.

WARNINGBefore field stripping, make certain the weapon is cleared and safe.

0012 00-1

TM 05539-IN

DISASSEMBLY OF WEAPON - CONTINUED 0012 00

FIELD STRIPPING THE WEAPON - CONTINUED

1. If inserted, remove magazine assembly.2. Remove floor plate (2) from magazine assembly (1).

3. Remove spring (4) and follower assembly (3) frommagazine assembly (1).

1

2

M40-039

1

3

4

M40-040

0012 00-2

TM 05539-IN

DISASSEMBLY OF WEAPON - CONTINUED 0012 00

FIELD STRIPPING THE WEAPON - CONTINUED

4. Remove follower (3) from spring (4).

5. Depress and hold the bolt release while pulling the bolt body assembly to the rear and out of the barrel and receiverassembly. If further disassembly of the bolt is required, refer to Bolt Body Assembly Maintenance (WP 0013 00).

6. Disassembly is now complete. If further disassembly of receiver and stock are required, refer to Removal of BarreledReceiver from Stock (WP 0016 00).

NOTEThe operator is NOT authorized to disassemble the weapon beyond this point.

END OF WORK PACKAGE

3

4

M40-041

0012 00-3/(0012 00-4 Blank)

TM 05539-IN

6

BOLT BODY ASSEMBLY MAINTENANCE 0013 00


Inspection, Disassembly, Reassembly

INITIAL SETUP


Tools and Special ToolsBolt disassembly toolFiring pin protrusion gageE2900/E7900 Tool Kit

Equipment ConditionsWeapon cleared (WP 0012 00)Bolt assembly removed (WP 0012 00)

WARNINGDO NOT interchange bolt body assemblies from one weapon to another.

INSPECTION

1. Check that the bolt handle is firmly attached to the bolt body assembly and the solder has no cracks. If cracked, evacuateto higher level maintenance.

2. Inspect the face of the bolt for cracks, chips or pitting. If unserviceable, evacuate to higher level maintenance.3. Inspect the firing pin to make sure it is straight and has a smooth, round tip. Ensure that firing pin is clean and lightly

oiled. If unserviceable, replace firing pin assembly.4. Check the extractor for cracks, chips or burrs and for proper tension by pushing toward the outer edge of the bolt face;

there should be some resistance and the extractor should return to its original position. If unserviceable, evacuate tohigher level maintenance for extractor replacement.

5. Check the ejector for cracks, chips or burrs and for proper tension by depressing inward; there should be some resistanceand the ejector should return to its original position. Ejector should depress slightly below the face of the bolt.

0013 00-1

TM 05539-IN

BOLT BODY ASSEMBLY MAINTENANCE - CONTINUED 0013 00

DISASSEMBLY

1. Place the bolt body assembly (7) in a vertical position with the handle up.2. Place the hook (6) of the bolt disassembly tool (5) into the disassembly notch (3) in the firing pin cap (2).

WARNINGThe firing pin is under spring tension. Release it slowly to prevent injury to personnel.

3. Pull down on the handle (4) of the bolt disassembly tool (5) to compress the firing pin spring and relieve the tension onthe bolt body assembly (7).

4. Turn the bolt disassembly tool (5) counterclockwise to unscrew and separate the firing pin assembly (1) from the boltbody assembly (7).

1

2 3

7

4

4

5

M40-031

6

5

6

0013 00-2

TM 05539-IN


DISASSEMBLY - CONTINUED

5. Once the firing pin assembly (1) is separated from the bolt body assembly (7), use a 1/16-in. punch and a 4-oz hammerto drive out the ejector retaining pin (10).

WARNING

The ejector is under spring tension. Use care to prevent it from flying free. Failure to follow this warn-ing may result in injury or death to personnel.

NOTE

Replace knurled retaining pin with required spring pin. Always use a new spring pin whenever theejector retaining pin is removed.

6. With the bolt handle in the down position, remove ejector (9) by drifting (right to left) the ejector retaining pin (10) justfar enough to release the ejector and ejector spring (8) using a 1/16-in. punch and ball peen hammer.

REASSEMBLY

CAUTION

DO NOT interchange firing pin assembly with another bolt body assembly. This could cause a shortor long firing pin protrusion problem.

1. Install the ejector spring (8) and the ejector (9) into the bolt body assembly (7).

NOTE

Replace knurled retaining pin with required spring pin. Always use a new spring pin whenever theejector retaining pin is removed.

2. Using punch and hammer, install the ejector retaining pin (10) into the bolt body assembly (7).

3. Lightly grease the thread of the bolt lug (11) and then screw the firing pin assembly (1) into the bolt body assembly (7)by turning clockwise.

1 7 8

10

9

M40-032

11

0013 00-3

TM 05539-IN


REASSEMBLY - CONTINUED

4. Place the hook (6) of the bolt disassembly tool (5) into the disassembly notch (2) on the firing pin cap (3) and pull thehandle (4) to compress the firing pin spring.

5. Screw in firing pin assembly (1) until the cocking leg is fully seated and in the fired position to the back of the bolt bodyassembly (7). Ensure the firing pin protrudes from the bolt face, then measure firing pin protrusion.

6. Inspect the firing pin (1) protrusion using the firingpin protrusion gage (13) inside the bolt face (12). Thefiring pin protrusion is correct if the gage hits the fir-ing pin on the 0.044 minimum and clears on the 0.060maximum. If the protrusion is too short or too long,replace the firing pin assembly.

2

3

5

1

11

M40-034

46

7

2

13

12 M40-035

1

0013 00-4

TM 05539-IN


REASSEMBLY - CONTINUED

7. Turn clockwise until cocking leg on firing pin assem-bly goes into the small notch (14) on rear rim of thebolt body assembly (7). The bolt assembly is nowcocked.

END OF WORK PACKAGE

14

7

M40-036

0013 00-5/(0013 00-6 Blank)

TM 05539-IN

2

FIRING PIN ASSEMBLY 0014 00


Disassembly, Inspection, Reassembly

INITIAL SETUP


ReferencesWP 0022 00

Equipment ConditionsWeapon cleared (WP 0012 00)Firing pin removed from bolt (WP 0013 00)


0014 00-1

TM 05539-IN

FIRING PIN ASSEMBLY - CONTINUED 0014 00

DISASSEMBLY

No disassembly of the firing pin assembly (1) is authorized. Remove the firing pin assembly from the bolt body assem-bly. Refer to Bolt Assembly Maintenance (WP 0013 00) in this manual.

INSPECTION

NOTEDO NOT disassemble the firing pin assembly. Any worn or unserviceable part requires replacementof complete assembly.

1. Inspect the firing pin assembly for cracks or damages. Ensure that the firing pin tip is smooth and round. Damages ordefects to any part require replacement of the entire firing pin assembly.

2. Verify the protrusion of the firing pin in the face of the bolt. Refer to WP 0013 00 for procedures on checking firing pinprotrusion.

REASSEMBLY

Reassemble the firing pin assembly into the bolt body assembly. Refer to Bolt Body Assembly Maintenance (WP 001300) for the procedure on reassembly of the bolt.

END OF WORK PACKAGE

1

M40-019

0014 00-2

TM 05539-IN

2

TRIGGER GUARD AND MAGAZINE WELL INSPECTION 0015 00



INITIAL SETUP

Maintenance Level

Organizational

Tools and Special Tools

E2900/E7900 Tool Kit


WARNING

Always assume every weapon is loaded until it is determined through visual and physical inspectionthat it is not. Procedures for clearing/unloading the weapon are outlined in WP 0012 00. Failure to fol-low this warning may cause injury or death to personnel.

DISASSEMBLY

1. Remove two trigger guard screws (1) from trigger guard (2).

2. Remove the trigger guard (2) from the stock (3).

1

2

1

3M40-029

0015 00-1

TM 05539-IN

TRIGGER GUARD AND MAGAZINE WELL INSPECTION - CONTINUED 0015 00

INSPECTION

1. Inspect trigger guard (2) and magazine well (4) for cracks or damage. If cracks or damage exist, evacuate to a higherlevel of maintenance.

2. Insert magazine into magazine well (4) of trigger guard (2). Ensure magazine locks into magazine well.

3. Ensure magazine release (5) has spring tension. If unserviceable, evacuate to higher level maintenance.

REASSEMBLY

1. Install trigger guard (2) into stock (3) of weapon.

NOTETrigger guard screws are different lengths. Ensure the long screws are installed in the rear and theshort screw in the front and torqued to specifications.

2. Install two trigger guard screws (1) into trigger guard (2).

END OF WORK PACKAGE

2

5

4

M40-030

1

2

1

3M40-029

0015 00-2

TM 05539-IN

4

REMOVAL OF BARRELED RECEIVER FROM STOCK 0016 00



INITIAL SETUP

Maintenance Level

Organizational



Vise with padded jaws

T30 Torx wrench

References

WP 0020 00

Equipment Conditions

Weapon cleared (WP 0012 00)

Suppressor removed (If necessary) (M40A5 only)

Telescope removed

DISASSEMBLY

1. Hold the weapon with one hand and support heel of stock on workbench.

2. Remove two trigger guard screws (2 and 4) from trigger guard (3).

3. Remove the trigger guard (3) from stock (1).

CAUTIONNever rock barrel and receiver to the weapon’s front and rear. This may damage the bedding surfaceand decrease accuracy.

4. Using padded vise jaws to prevent marring the stock, clamp stock in a vise forward of the recoil lug. Open the bolt to thefully open position and grasp the barrel and bolt body. Using thumbs to apply downward pressure on the stock, pull thebarrel and receiver straight up. If necessary, rock the barreled action from side to side while lifting.

12 3

4

M40-020

0016 00-1

TM 05539-IN

REMOVAL OF BARRELED RECEIVER FROM STOCK - CONTINUED 0016 00

INSPECTION1. On the stock, check the bedding on top and under trigger guard for cracks, powdering and shrinkage. Pay special atten-

tion to the bridge on stock. Check for cracks. Check that all edges are rounded. Using a rag dampened with acetone,clean glass bedding surfaces of the stock of all oil, grease, dirt, and debris. Remove all excess oil from the barreledaction where it contacts the glass bedding.

2. (M40A3) Inspect the muzzle end of the barrel (5) for a serviceable crown (6). The lands and grooves should come to asharp end with no nicks or burrs. If unserviceable, evacuate to a higher level of maintenance. (M40A5) Inspect muzzlebreak (8) for looseness, damage, and/or cracks. Inspect bearing surfaces (7) for burrs. If unserviceable evacuate to ahigher level of maintenance.

3. Inspect the external surface of the barrel (5) and receiver (9) for burrs and visible cracks. If found, evacuate to a higherlevel of maintenance.

4. Inspect inside the receiver (9) and chamber area for nicks or burrs that would cause hard extraction or chambering a rup-tured case, or break extraction upon firing. If any of these conditions exist, the weapon is unserviceable. Evacuate to ahigher level of maintenance.

5

6

M40-021

M40-086

8

7

9 5

M40-022

0016 00-2

TM 05539-IN

REMOVAL OF BARRELED RECEIVER FROM STOCK - CONTINUED 0016 00

INSPECTION - CONTINUED

5. Inspect the trigger guard screws (2 and 4) for wear, unserviceable threads, and correct length. If unserviceable or incor-rect length, evacuate to higher level maintenance.

REASSEMBLY

1. Place the barreled receiver in the stock and press straight down on the receiver over the recoil lug. Ensure barreledreceiver is fully seated in stock.

CAUTION• When installing the trigger guard screws, ensure that the short screw goes into the hole in the front por-

tion of the trigger guard.

• The long screw goes into the rear hole next to the trigger guard bow.

2. Install the forward trigger guard screw (4) first, followed by the rear trigger guard screw (2). Snug both trigger guardscrews by hand. Using a torque wrench, tighten to setting specified in the Weapon Record Book. Torque the forwardtrigger guard screw first, then the rear trigger guard screw.

3. Once the weapon is completely reassembled, perform the Function Check. Refer to WP 0020 00.

4. Install suppressor if necessary (TM 05539-OR_).

END OF WORK PACKAGE

4

M40-023

2

24

M40-020A

0016 00-3/(0016 00-4 Blank)

TM 05539-IN

8

MUZZLE BREAK MAINTENANCE 0017 00


Inspection, Removal, Installation, Timing Wheel Instructions

INITIAL SETUP

Maintenance Level

Organizational



Wrench, combination

Torque wrench

Materials/PartsShim kitAcetoneCotton swabsThread sealant (Rocksett®)


INSPECTION

NOTERemoval of muzzle break is not necessary for inspection. If muzzle break is removed/replaced, shimkit is required for installation.

Inspect the muzzle break (1) for looseness, misalignment, and cracks or other damage. Inspect bearing surfaces (2) for wear,damage, or burrs that may affect proper seating of the suppressor.

M40-090

1 2

0017 00-1

TM 05539-IN

MUZZLE BREAK MAINTENANCE - CONTINUED 0017 00

REMOVAL

1. Secure the barrel (3) in a vise or fixture.2. Using the combination wrench, loosen and remove the muzzle break (1) by rotating it counter-clockwise while facing

the muzzle of the barrel (3).

3. Remove and discard any/all shims (4) from the barrel (3).4. Remove the barrel (3) from the vise or fixture.

M40-091

3 1

M40-092

4

3

0017 00-2

TM 05539-IN


INSTALLATION

1. With the barrel (3) pointing up (vertical), install the shims (4) on the barrel. Ensure the shims are centered on the barrel.2. Install the muzzle break (1) over the shims and onto the barrel (3) and slowly tighten by hand.3. Secure the barrel (3) in a vise or fixture.4. Using the combination wrench and a torque wrench, tighten the muzzle break (1) to 20-23 lb-ft.5. Check alignment of the index notch (5); it should be positioned at bottom dead center (BDC) after torque. If the index

notch is not at BDC, add shims between the barrel (3) and muzzle break (1) as described until alignment is achieved.Consult the shim chart below and the timing wheel on the following page as aids in determining the correct amount ofshims needed for proper alignment of the index notch.

Table 1. Shim Chart.

Thickness Amount

Note: Approximate amount shim will rotate adapter.

.005 = 1/8 of a turn

.008 = 1/5 of a turn

.010 = 1/4 of a turn

.012 = 1/3 of a turn

.020 = 1/2 of a turn

5 M40-093

1

0017 00-3

TM 05539-IN


INSTALLATION - CONTINUED

6. Remove muzzle break (1) after proper alignment has been achieved. Use care to not lose shims.

7. Remove the barrel (3) from the vise or fixture.8. Clean and degrease the threads (6) and contact area (7) of the barrel with acetone.9. Clean the internal threads of the muzzle break with a cotton swab and acetone.10. Prefit muzzle break to determine correct shim (4) needed for final installation using timing wheel procedure. See Timing

Wheel Instructions in this work package.

NOTEDo not apply thread sealant between or behind shims.

11. Apply a thin coat of thread sealant (Rocksett®) to any exposed surface (8) on the barrel (3) that is covered by the muzzlebreak.

12. Apply a thin coat of thread sealant (Rocksett®) to the threads (6) of the barrel (3).13. Apply a thin coat of thread sealant (Rocksett®) to the internal portion of the muzzle break.14. With the barrel (3) pointing up (vertical), install the correct shims (4) on the barrel. Ensure the shims are centered on the

barrel and install to muzzle break over the shims onto the barrel.15. Secure the barrel (3) in a vise or fixture.

M40-090

1

0017 00-4

TM 05539-IN


INSTALLATION - CONTINUED

16. Using the combination wrench and a torque wrench, tighten the muzzle break (1) onto the barrel (3), to 20-23 lb-ft.

17. Run a dry patch through the bore after assembly to ensure no sealant (Rocksett®) is present in the bore.18. Allow the sealant (Rocksett®) to cure for 24 hours prior to firing the weapon.

M40-092

4

3

8

7

6

M40-091

3 1

0017 00-5

TM 05539-IN


TIMING WHEEL INSTRUCTIONS

1. Screw adapter onto muzzle until firmly hand tight.2. Slide timing wheel over adapter with printed side facing toward you and printed TDC pointing straight up (12 o’clock

position).3. With eyes in front of muzzle, note which timing wheel “pie slice” lines up with adapter indexing notch, and note the

shim listed on that pie slice. Installing those shims places notch in correct 6 o’clock position when adapter is properlytorqued.

NOTEIf adapter notch aligns with gray area of wheel after initial hand-tightening, you may not need shims.

0017 00-6

TM 05539-IN


END OF WORK PACKAGE

TIMING WHEEL FOR 24 THREADS PER INCHAND 1 MM METRIC

Adapter notch should bein shaded area before finaltorquing to 6 o’clock position

Correct final position of indexing notch

0017 00-7/(0017 00-8 Blank)

TM 05539-IN

2

BIPOD ASSEMBLY MAINTENANCE 0018 00


Bipod Assembly: Removal, Inspection, Installation

INITIAL SETUP

Maintenance Level

Organizational



BIPOD ASSEMBLY REMOVAL


Loosen bipod screw (4), pinch bipod mounting clamps together (3), and remove bipod assembly (2) from weapon stock (1).

BIPOD ASSEMBLY INSPECTION

1. Check for proper operation.

2. Check for any damage.

3. Replace if damaged or not operating properly.

1

4

3 2

M40-045

0018 00-1

TM 05539-IN

BIPOD ASSEMBLY MAINTENANCE - CONTINUED 0018 00

BIPOD ASSEMBLY INSTALLATION

1. Pinch mounting clamps (3) together, position bipod (2) on weapon stock (1) and release clamps.2. Tighten bipod screw (4).

END OF WORK PACKAGE

1

4

3 2

M40-045

0018 00-2

TM 05539-IN

2

REASSEMBLY OF WEAPON 0019 00


Reassembling the Weapon, Safety Check

INITIAL SETUP



Equipment ConditionsWeapon cleared (WP 0012 00)Bolt body assembly removed (WP 0012 00)

REASSEMBLING THE WEAPON

WARNINGDO NOT exchange or switch bolt assemblies from one weapon to another. Doing so may cause injuryor death to personnel.

1. Bolt Body Assembly. a. Align the locking lugs of the bolt body assembly with the bolt track inside the receiver, and push forward.b. Check the function of the bolt assembly by cycling the bolt in and out of battery a few times.

0019 00-1

TM 05539-IN

REASSEMBLY OF WEAPON - CONTINUED 0019 00

REASSEMBLING THE WEAPON - CONTINUED

2. Magazine Assembly. a. Compress spring (4) to identify longest leg.b. Slide the longest magazine spring leg underneath

the magazine floor plate (2) until it is fullyseated. Slide the short leg inside the follower (3)until it is fully seated. To avoid feeding prob-lems, ensure that the short leg of the spring isinside the follower, not the floor plate.

c. Install follower (3) in magazine assembly (1).d. Compress spring (4) with floor plate (2).e. Attach floor plate (2) to magazine assembly (1).

3. Function Check. See Function Check (WP 0020 00)in this manual.

END OF WORK PACKAGE

2

4

3

1

M40-044

0019 00-2

TM 05539-IN

2

FUNCTION CHECK 0020 00


Function Check

INITIAL SETUP




FUNCTION CHECK

WARNINGAlways assume every weapon is loaded until it is determined through visual and physical inspection itis not. Procedures for clearing/unloading the weapon are outlined in WP 0012 00. Failure to followthis warning may cause injury or death to personnel.

Whenever the weapon is disassembled beyond normal field stripping, perform a functional check when the weapon isreassembled. This quick check indicates whether or not the weapon has been properly assembled with all of its components. Afunctional check can also reveal the more obvious malfunctions that occur between interactive components of the weapon. Tocomplete a functional check, perform the following procedures:1. With the bolt closed on an EMPTY chamber, place the weapon on “SAFE”.2. Pull the trigger. The firing pin assembly should not disengage from the sear safety cam of the trigger mechanism.3. With the weapon remaining on “SAFE”, rotate the bolt handle and manipulate the bolt out of battery and up against the

bolt stop. The bolt should manipulate in and out of battery while the weapon remains on “SAFE.”4. Close the bolt back into battery. Check to ensure that the weapon remains on “SAFE” and will not fire.5. Push the safety lever forward to the “FIRE” position. The firing pin assembly should remain engaged with the sear and

not fire.6. Squeeze the trigger. The firing pin assembly should release from the sear. You should hear an audible click.7. With the safety in the “FIRE” position, manipulate the bolt as in step 3, but vigorously. Bolt should manipulate without

the weapon slam firing.

0020 00-1

TM 05539-IN

FUNCTION CHECK - CONTINUED 0020 00

FUNCTION CHECK - CONTINUED

8. Load five dummy rounds in magazine assembly.9. With safety on, insert magazine assembly with dummy rounds into magazine well.10. Cycle bolt in and out of battery to check feeding, chambering, extracting, and ejecting.

WARNINGThe ability of the weapon to fire by manipulation of the bolt in and out of battery without pulling thetrigger is known as “slam firing”. Should the weapon slam fire, evacuate to Intermediate Mainte-nance. Failure to follow this warning may cause injury or death to personnel.

11. Check for slam fire condition.12. With safety on, attempt to fire weapon. Weapon should not fire.

NOTE If trigger is hard (heavy) or very easy (light) to pull, trigger may not be within the weight standards;evacuate weapon to IMA. Only a MOS 2112 is authorized to make this weight adjustment. Failure tofollow this warning may cause injury or death to personnel.

13. With the safety in FIRE position, attempt to fire weapon. Weapon should fire.

END OF WORK PACKAGE

0020 00-2

TM 05539-IN

2

PREPARATION FOR STORAGE AND SHIPMENT 0021 00

STORAGE PROCEDURES

WARNING • DO NOT store the weapon with live ammunition in either the chamber or magazine. • Always assume every weapon is loaded until it is determined through visual and physical inspection that

it is not. Procedures for clearing/unloading the weapon are outlined in WP 0012 00. • Failure to follow these warnings may cause injury or death to personnel.

1. Stored for Extended Periods. When the weapon is to be stored for an extended period (greater than 90 days), followthe procedures outlined in MCO P4450.7, Preparation for Storage. Ensure the weapon is thoroughly cleaned as outlinedin TM 05539-OR_.

2. Storage Procedures. a. Ensure the chamber and magazine do not contain live ammunition. b. Inspect the bore and chamber and apply a medium coat of CLP. c. Apply a light coat of CLP to all other metal surfaces of the weapon to provide extra lubrication and corrosion pro-

tection. Ensure the CLP does not come in contact with the telescope.

SHIPPING PROCEDURES

1. Depot Level Maintenance. Weapons requiring Depot Maintenance will be shipped to Weapons Training Battalion,Quantico, VA 22134, in accordance with the following procedures and in accordance with MCO P4610.19, Report ofTransportation Discrepancies in Shipment and MCO 8020.1, Handling Transportation, Storage, Reclassification andDisposal of Class V (W) Material.

WARNING Under NO circumstances should live ammunition be shipped with the weapon, either in the shippingbox, magazine, or chamber. Failure to follow this warning may cause injury or death to personnel.

2. Shipping Procedures. a. Ensure no ammunition is present in the weapon by following the clearing procedures found in WP 0012 00. b. Complete NAVMC 1018 tag in accordance with TM 4700-15/1_ and detail the required maintenance action as

thoroughly as possible. c. Clean the weapon by following the procedures outlined in TM 05539-OR_. d. Place the weapon in its carrying case, with its Supply System Responsibility Items (SSRI) and Stock List (SL-3)

and place it in a shipping box. Fill the shipping box with cushioning material. Close the box and seal all seams andjoints with tape or caulk.

e. Mark the box in accordance with MIL-STD-129, Military Standard, Marking for Shipment and Storage.Ship through U.S. Registered Mail, Return Receipt Requested. Address the shipment to:

Commanding Officer Weapons Training Battalion Marine Corps Combat Development Center 27251 Garand Road Quantico, VA 22134-5036 Attn: Precision Weapons Section

f. When repairs are complete, the weapon system will be returned to Marine Corps Logistics Bases Albany, GA orBarstow, CA, to be placed in stock.

END OF WORK PACKAGE

0021 00-1/(0021 00-2 Blank)

TM 05539-IN

CHAPTER 4INTERMEDIATE MAINTENANCE

TM 05539-IN

4

BARRELED RECEIVER 0022 00


Inspection

INITIAL SETUP

Maintenance LevelIntermediate

Tools and Special ToolsE2900/E7900 Tool KitVise with padded jawsT30 Torx wrench


Equipment ConditionsWeapon cleared (WP 0012 00)Bolt body assembly removed (WP 0012 00)Barreled receiver separated from stock

(WP 0016 00)Suppressor removed (M40A5 only)

(TM 05539-OR_)

INSPECTION

WARNINGEnsure the weapon is cleared before performing these procedures. Failure to follow this warning maycause injury or death to personnel.

1. Inspect the bedding surface inside the stock for worn or degraded glass from solvents or CLP. If the weapon requires aglass bedding (skim), recreate the glass bedding using the Marine-tex® compound. Use modeling clay or putty and sealall holes. Spray the barreled receiver with Mold Release compound before mating it with the stock. Refer to Skim Glass-ing (WP 0026 00).

0022 00-1

TM 05539-IN

BARRELED RECEIVER - CONTINUED 0022 00


2. Inspect the muzzle end of the barrel (1) for a serviceable crown (2). The lands and grooves should come to a sharp endwith no nicks or burrs. If required, re-crown using a 45-degree cut crowning tool.

a. Secure barrel (1) in padded vise.

b. Mount 45-degree cut crowning tool onto a .308 caliber mandrel.

c. Lubricate crowning tool with cutting fluid and fully insert mandrel until the crowning tool touches the muzzle.

NOTEWhen crowning muzzle, a 360-degree cut must be accomplished. This is done in 180-degree incre-ments, with each turn of the crowning tool.

d. Apply firm pressure with your thumb on back of crowning tool and, with the other free hand, rotate the crowningtool 180 degrees clockwise. Reposition your hand and complete the remaining 180-degree cut; continue untilsmooth.

NOTEIf muzzle break is removed, new shim washers must be installed.

e. (M40A5) Inspect the muzzle break (4) for looseness, cracks, and/or damage. Inspect bearing surfaces (3) for burrs.Replace muzzle break as necessary.

1

2

M40-021

M40-086

4

3

0022 00-2

TM 05539-IN

BARRELED RECEIVER - CONTINUED 0022 00


3. Inspect barrel and receiver for burrs. Check chamber area for nicks or burrs that would cause hard extraction or cham-bering. Burrs in chamber area may also cause a ruptured case or a failure to extract. If there are visible cracks in the bar-rel and receiver, chamber, or muzzle break, request WIR disposition from Material Manager, Albany, GA.

NOTE• Front and rear trigger guard screws are identical when new.

• The screws must be modified. See step 6 in this work package.

4. Inspect the trigger guard screws (3 and 4) for wear, unserviceable threads, and correct length. When replacing front trig-ger guard screw (4) and rear trigger guard screw (3), they must be modified to length.

NOTE• To ensure proper tension on screws, allow only one thread depth under flush of the inside bottom of the

receiver.

• Bolt should not hit screws after screws are torqued.

5. Using a grinding wheel on both trigger guard screws (3 and 4), remove metal until the overall length is approximately1-1/4 inches for the front trigger guard screw (4) and 1-5/8 inches for the rear trigger guard screw (3). If needed, adjustscrew length until the screws thread-in flush or recess a maximum of one thread below the inside bottom of the receiver.

6. With a stone, bevel trigger guard screws to remove all sharp edges.

END OF WORK PACKAGE

34 M40-025

0022 00-3/(0022 00-4 Blank)

TM 05539-IN

4

BOLT BODY ASSEMBLY 0023 00


Disassembly, Inspection, Reassembly, Headspace

INITIAL SETUP


Tools and Special ToolsE2900/E7900 Tool KitBolt disassembly toolHeadspace gage, 1.630 in.Headspace gage, 1.638 in.Jeweler’s screwdriver (.080)Firing pin protrusion gage1/16-in. punch4-oz hammer

ReferencesWP 0020 00WP 0021 00

Equipment ConditionsWeapon cleared (WP 0012 00)Bolt assembly removed (WP 0012 00)Firing pin removed from bolt (WP 0013 00)

0023 00-1

TM 05539-IN

BOLT BODY ASSEMBLY - CONTINUED 0023 00

DISASSEMBLY

1. Once the firing pin is separated from the bolt body, use a 1/16-in. punch and 4-oz hammer to drive out the ejector retain-ing pin (5) from bolt body assembly (1).

2. Remove the ejector (4) and the ejector spring (3) from bolt body assembly (1).

3. Use a jeweler’s screwdriver (.080), pry and lift the extractor (2) out of the recess rim in the bolt body assembly (1).

INSPECTION

1. Check that the bolt handle (6) is firmly attached to the bolt body assembly (1) and the solder has no cracks.

2. Inspect the face of the bolt for cracks, chips, or pitting. If unserviceable, request WIR disposition from Material Man-ager, Albany, GA.

3. Check the ejector (4) for cracks, chips, or burrs and for proper tension by depressing inward; some resistance should befelt against the ejector spring (3) and the ejector should return to its original position. If unserviceable, replace ejectorand/or ejector spring.

4. Check the extractor (2) for cracks, chips, or burrs. Check function by depressing inward; some resistance should be feltand the extractor should return to its original position. If unserviceable, replace extractor.

REASSEMBLY

1. Install extractor (2) on bolt body assembly (1).

2. Install the ejector spring (3) and the ejector (4) on bolt body assembly (1).

3. Using a punch and hammer, install the ejector retaining pin (5) into the bolt assembly (1).

CAUTIONDO NOT interchange firing pin assembly with another bolt body assembly. This could cause a shortor long firing pin protrusion problem.

4. Reassemble the firing pin assembly into the bolt body assembly. Procedures are outlined in Bolt Body Assembly Mainte-nance (WP 0013 00).

M40-046

1

5

23

4

6

0023 00-2

TM 05539-IN

BOLT BODY ASSEMBLY - CONTINUED 0023 00

HEADSPACE

WARNING

The firing pin is under spring tension. Release it slowly to prevent injury to personnel.

NOTE

• The M40A3/A5 has a 10,000 round life expectancy and is to be auto-retrograded to the Weapons Train-ing Battalion in Quantico, VA.

• Shipping procedures are outlined in WP 0021 00.

1. Clean chamber, bolt lugs, and bolt face thoroughly before checking headspace.

NOTE

The extractor does not have to be removed.

2. Disassemble the bolt body assembly and remove the ejector and ejector spring.

3. Pull bolt body assembly (1) to the rear, insert the “Go” headspace gage (7) (1.630) inside the chamber (8), and close thebolt onto the headspace gage. Bolt handle (6) should close completely with no resistance.

4. Pull bolt body assembly (1) to the rear, insert the “No-Go” headspace gage (7) (1.638) inside the chamber (8), and closethe bolt onto the headspace gage. Bolt handle (6) should not close completely or should have slight resistance. If weapondoes not meet headspace criteria, request WIR disposition from Material Manager, Albany, GA.

5. Reassemble the ejector spring, ejector, and ejector retaining pin in the bolt body assembly.

6. Reinstall bolt assembly. Refer to WP 0012 00.

7. When the weapon is completely reassembled, perform the functional check procedures outlined in Function Check (WP 0020 00).

END OF WORK PACKAGE

M40-048

6

8

1

7

0023 00-3/(0023 00-4 Blank)

TM 05539-IN

12

SAFETY AND TRIGGER MECHANISM 0024 00


Disassembly, Assembly, Inspection, Staking the Receiver, Replace Unserviceable Trigger, Testing the Trigger Pull

INITIAL SETUP


Tools and Special ToolsE2900/E7900 Tool KitJeweler’s screwdriver (.080)Trigger test fixtureTrigger test weights1/8-in. punch1/16-in. hex-head wrench4-oz hammer8-oz ball peen hammer

Materials/Parts

Sealing compound (Loctite 290) (Item 18, WP0030 00)

References

WP 0020 00



Bolt assembly removed (WP 0012 00)

Barreled receiver separate from stock (WP 0016 00)

0024 00-1

TM 05539-IN

SAFETY AND TRIGGER MECHANISM - CONTINUED 0024 00

DISASSEMBLY

NOTE

The sear and sear spring are released upon removing the front trigger pin. Take caution when remov-ing the trigger assembly from the receiver.

1. From right side of receiver (2), use a 1/8-in. punch and 4-oz hammer to drive out the rear trigger pin (1). Remove boltstop release (3) and bolt stop spring (5) from trigger housing assembly (4).

5

5

1

2

4

3

M40-051

1

0024 00-2

TM 05539-IN



2. Tap out front trigger pin (6) and remove trigger housing assembly (4) from receiver (2).

M40-052

4

6

2

0024 00-3

TM 05539-IN



3. Remove sear (7) and sear spring (8) from trigger housing assembly (4).

M40-053

7

8

4

0024 00-4

TM 05539-IN



4. Using a jeweler’s screwdriver (.080), remove the retainer clip (11), safety spring (12), safety ball (10), and safety pivotpin (13) from trigger housing assembly (4).

5. Slide the safety (9) off of trigger housing assembly (4).

M40-054

9

10

11

4

12

13

0024 00-5

TM 05539-IN



6. Using a 1/8-in. punch and 4-oz hammer, drive out the trigger pin (14) from trigger housing assembly (4).7. Remove trigger (15) and connector from trigger housing assembly (4).8. Clean or replace trigger parts as required.

ASSEMBLY

1. Align trigger (15) and connector in trigger housing assembly (4) and install trigger pin (14) using a 1/8-in. punch and4-oz hammer.

2. Place bolt stop release (3) on trigger housing assembly (4) and insert safety (9). While maintaining proper alignment,insert safety pivot pin (13) from the left side of trigger assembly through the bolt stop release and safety. Install thesafety ball (10) and safety detent spring (12).

3. Install retainer clip (11) over safety pivot pin (13) using a jeweler’s screwdriver (.080).

M40-055

15

144

0024 00-6

TM 05539-IN


ASSEMBLY - CONTINUED

M40-056

12

13

3 15

4

14

11

109

0024 00-7

TM 05539-IN



4. Install sear spring (8) and sear (7) into the trigger housing assembly (4).

M40-053

7

8

4

0024 00-8

TM 05539-IN



5. Using jaw pads, hold barreled receiver in vise.

6. Ensure safety is set in the “SAFE” position. While holding the sear spring and sear together, insert trigger assembly intrigger slot in the bottom of the receiver.

NOTE

• The front trigger pin is shorter than the rear trigger pin.

• Insert tapered ends of trigger pins first.

7. Using finger pressure, squeeze the trigger (15) together vertically so that the holes in the sear, trigger housing assembly(4), and receiver (2) are aligned. From the left side of receiver, insert the front trigger pin (6) (tapered end first) ensuringit is flush with the edge of the bolt stop slot on the receiver. Insert the rear trigger pin (1) (taper end first), ensuring it isflush with or slightly below the edge of the bolt stop slot on the receiver.

8. Place bolt stop spring (5) over the rear of the trigger pin (1) with the short leg of the spring captured against the receiver(2) in the trigger housing assembly (4) slot. While holding the front leg of the bolt stop spring out of the way, insert thebolt stop release (3) into the bolt stop slot on the receiver.

9. Ensure that the hole on the bolt stop release (3) is aligned with rear trigger pin (1) hole. Use a 1/8-in. punch and 4-ozhammer to drive the rear trigger pin through the bolt stop release until it is flush with the outside edge of the bolt stop.

M40-057

6 5

1

4

3

15

2

0024 00-9

TM 05539-IN



10. Check the operation of the bolt stop and bolt stop release by pressing on the bottom of the bolt stop release. The boltstop release should travel freely along the trigger housing and return to the resting position under spring tension withoutbinding. The bolt stop should also pivot and travel freely without binding or dragging on the receiver or front trigger pin.Ensure there is no dead slack between the bolt stop release and bolt stop (bolt stop should begin moving as soon as thebolt stop release is pressed). If there is any binding or dead slack, adjust as necessary until components operatesmoothly.

11. Inspect the trigger pins for looseness. Using a 1/8-in. punch, push on pins with moderate hand pressure. If the triggerpins are loose, the bottom of the receiver must be staked to secure them.

INSPECTION

1. Inspect safety and trigger for cleanliness.

2. Check the feel of the trigger pull. The trigger pullshould have a clean, crisp brake and the pull weightshould be between three and five pounds. Use a 1/16-in. hex-head wrench to adjust the fine-tune adjustmentscrew (16) to achieve the desired pull weight.

3. Check that the connector, bolt stop, bolt stop release, and sear operate freely and without binding. Replace as required.4. Ensure that all setscrews are present and a small amount of sealing compound is applied to the tops of the screws to pre-

vent them from loosening from vibration.5. Ensure that both trigger pins are present and not bent.6. Check the function of the safety and check for excessive play on the safety arm. With the bolt cocked and the safety set

in the “SAFE” position, the weapon should not fire. When the safety is moved to the “FIRE” position, the weaponshould fire when the trigger is pulled. If required, disassemble the safety mechanism and bend the safety spring toincrease tension.

7. Replace parts that are unserviceable.

M40-058

16

0024 00-10

TM 05539-IN


STAKING THE RECEIVER

CAUTIONTo prevent damage to the receiver, DO NOT stake receiver too close to the edge of the trigger pin holeor too deep. Be careful not to damage trigger assembly while staking.

1. Place weapon upside down in vise with trigger and trigger pins inserted.2. Using a 1/8-in. center punch and 8-oz ball peen hammer, stake the bottom of the receiver in the three positions.

3. The staking should not be any deeper than necessary to tighten the trigger pin in the trigger pin hole.

REPLACE UNSERVICEABLE TRIGGER

1. Inspect new trigger assembly.2. Install on receiver. Refer to procedures outlined in this work package.

M40-059

1

2 3

BOTTOM VIEW

LEFT SIDE

RIGHT SIDE

0024 00-11

TM 05539-IN


TESTING THE TRIGGER PULL

1. Place the test fixture (17) on the work bench and addtest weights (18) until minimum load of 3.0 lb isreached. Place on deck.

2. With a dummy round in chamber, cycle the bolt andmove the safety lever to the “FIRE” position.

3. Hold the weapon or receiver (2) vertically.4. Hook arm of trigger weight test fixture (17) over trig-

ger (15) and slowly lift the weapon straight up.

5. Fire weapon and recock. Ensure the dummy round is still in the chamber.6. Increase the weight to 5.0 lb on the test fixture and test again. Trigger should fire.7. If trigger did not perform as required, adjust until requirement is met. With a 1/16-in. hex-head wrench, adjust trigger

using fine tune adjustment screw. Be careful not to remove the fine tune adjustment screw or spring.8. Perform Function Check (WP 0020 00) when required trigger pull is met.

END OF WORK PACKAGE

M40-060

2

15

17

18

0024 00-12

TM 05539-IN

4

STOCK ASSEMBLY 0025 00



INITIAL SETUP


Tools and Special ToolsE2900/E7900 Tool Kit


Equipment ConditionsWeapon cleared (WP 0012 00)Bolt body assembly removed (WP 0012 00)Barreled receiver separated from stock

(WP 0016 00)

DISASSEMBLY

1. Remove sling swivel, if required.

2. Remove cheek piece screws (2) and cheek piece (1) from stock (3).

3. Remove recoil pad screws (6) from stock (3).

4. Remove recoil pad (5) and inserts (4) from stock (3).

M40-026

12

3

6

5 4

0025 00-1

TM 05539-IN

STOCK ASSEMBLY - CONTINUED 0025 00

INSPECTION

1. Check all parts for excessive wear, burrs, and cracks.

2. Ensure that sling swivels (11) have spring tension.

3. Ensure that the cheek piece (1) and recoil pad screws (6) are not worn or stripped.

4. Ensure the helicoil inserts (7) on both sides of the stock (3) are not stripped or stretched.

5. Ensure that the bipod stud (8) is not loose or damaged.

6. Ensure the cheek piece (1) locks in place when tightened.

7. Ensure that the bipod assembly (9) is serviceable; this includes ensuring that the legs extend and retract, that the bipodassembly pivots, and the pod lock (10) locks in place.

8. Inspect stock (3) for cracks. Cracks in the glass bedding will be routed out and reglassed. Refer to Skim Glassing (WP 0026 00). Stocks are under warranty. If cracks cannot be fixed, request WIR disposition from Material Manager,Albany, GA.

9. Replace any unserviceable parts.

M40-027

6

5

4

1

73

11

10

8

9

2

7

11

0025 00-2

TM 05539-IN

STOCK ASSEMBLY - CONTINUED 0025 00

REASSEMBLY

1. Install inserts (4) and recoil pad (5) on stock (3).2. Install recoil pad screws (6) in stock (3).3. Install cheek piece (1) on stock (3) and install cheek piece screws (2).

4. Place the barreled receiver in the stock and press straight down on the receiver over the recoil lug. Ensure barreledreceiver is fully seated. Refer to procedures outlined in Removal of Barreled Receiver from Stock (WP 0016 00).

NOTETrigger guard screws are different lengths. Ensure that long screw is installed in the rear and theshort screw is installed in the front.

5. Place trigger guard assembly in stock and install trigger guard screws until hand tight.6. Using a torque wrench, tighten to the settings specified in the Weapon Record Book.

END OF WORK PACKAGE

M40-026

1

2

3

6

5 4

0025 00-3/(0025 00-4 Blank)

TM 05539-IN

8

SKIM GLASSING 0026 00


Preparation for Barrel and Receiver, Preparation for Stock, Skim Glassing, Installation of Stock Accessory Rail, BreakingWeapon Out of Glass, Skim Glass Clean Up

INITIAL SETUP

Maintenance Level

Intermediate



Action Puller

Multi-tool

Materials/Parts

Acetone

Epoxy

1.5-in. masking tape

Materials/Parts - Continued2-in. masking tapeMarine-tex® catalystMarine-tex® putty epoxyModeling clayMold release compoundSandpaper (180 grit)

Equipment ConditionsWeapon cleared (WP 0012 00)Barrel receiver removed from stock (WP 0016 00)Bolt body assembly removed (WP 0012 00)

0026 00-1

TM 05539-IN

SKIM GLASSING - CONTINUED 0026 00

PREPARATION FOR BARREL AND RECEIVER

NOTECuring and drying time, including ambient temperature requirements, should be according to manu-factures’s recommendations.

1. Insert modeling clay inside following cavities on the bottom and side of the receiver (5), gas port hole (4), right side trig-ger pin holes (6), and trigger guard screw holes (7). Trim clay with a putty knife flush with the receiver. Clean receiverwith acetone.

2. Tape the barrel (10) with 2-in. masking tape (1) (3 wraps) and 1.5-in. masking tape (3) on the front of the recoil lug (2)and apply a 1/8 in. clay bevel to each side of the recoil lug.

3. Tape the bottom and sides of the recoil lug (2), wrapping twice with masking tape (1). Trim the overhang of maskingtape. The masking tape should come to 3/8-in. (8) on both sides of the recoil lug.

M40-066

6

54321

10

7

8

9

0026 00-2

TM 05539-IN


PREPARATION FOR BARREL AND RECEIVER - CONTINUED

4. Remove magazine release pin and magazine release from trigger guard assembly (11). Clay the magazine release pinhole (12).

5. Lightly grease the trigger guard screws.6. Mold release the trigger guard, the trigger guard screws, the action and 4 in. of the breech end of the barrel.

PREPARATION FOR STOCK

CAUTION• DO NOT remove the guard assembly from the stock. If skim glassing needs to be performed in this area,

evacuate weapon to higher maintenance level.• DO NOT overtighten vise. This may damage stock.

1. Place stock (17) in work vise, wrap stock with 2-in. masking tape (13), and sand all exposed areas of the top beddingsurface (15) of the stock with 180 grit sandpaper. Ensure all surfaces are roughed-up.

2. Using a 1/8-in. rotary tool bit without end cut, route the corners of the recoil lug mortise (14) position into the stock.Ensure that the bottom of the lug mortise and bridge (16) are roughed-up.

a. If the recoil lug mortise position on the stock is cracked, continue cutting into the crack until the crack disappears.b. Repeat on remaining three corners.

1211

M40-067

M40-068a

14 15

1617

13

0026 00-3

TM 05539-IN


PREPARATION FOR STOCK - CONTINUED

3. Inspect the top half of the stock (17) to ensure that all areas have been prepared for skim glassing.4. Insert three layers of 2-in. masking tape, 1.5 inches in front of the recoil lug’s position.5. Invert stock (17) in the vise. Using a 1/8-in. rotary tool bit, route the bottom bedding surface (18) of the stock very

lightly for the trigger guard assembly.

NOTERemoving excess material will disturb alignment of the bottom components to the stock.

6. Dry fit barreled action in stock to ensure there is a minimum of 1/16-in. clearance and a maximum of 1/8-in. clearancebetween the barrel and forward edge of barrel channel. Dry fit the trigger guard to ensure it is flush with the bottom ofthe stock.

7. Set torque wrench to 60 lb-in.NOTE

When mixing and working with epoxy, appropriate precautions should be taken in accordance withthe manufacture’s recommendations.

8. Mix epoxy.NOTE

Ensure torque wrench is set to 60 lb-in. prior to skim glassing.

SKIM GLASSING

1. Place stock (17) in vise, bottom side up, and with a small putty knife apply a light coat of epoxy/glass to the bottom bed-ding surface (18) in the stock, and the sides and bottom of the trigger guard assembly.

M40-069a

1817

M40-069b

1718

0026 00-4

TM 05539-IN


SKIM GLASSING - CONTINUED

2. Insert the trigger guard (11) inside the stock (17) and secure with masking tape (19).

NOTE• Ensure all areas are filled with epoxy/glass.• Fill lug mortise with epoxy/glass and pack in corners.

3. Invert stock (17) top-side up in vise and apply a light to moderate coat of epoxy/glass into the top bedding surface (15)of the stock.

4. Carefully place the barreled action into the stock, ensuring that alignment is maintained between the stock and theaction.

5. With weapon upright, clean excess glass out of trigger guard screw holes before inserting screws.6. Insert the trigger guard screws, ensuring that the front screw (shortest screw) is tightened first. Slowly tighten both

screws until slight pressure is felt.7. Torque the trigger guard screws (front first) to 60 lb-in.8. Pack glass on all edges and clean up excess epoxy/glass from the weapon.9. Set the weapon aside to dry for at least 24 hours. Do not allow it to rest on either the barrel or the trigger guard. Ensure

nothing touches the barreled receiver or trigger guard while epoxy/glass dries.

M40-070

17

11 19

M40-068b

1517

0026 00-5

TM 05539-IN


INSTALLATION OF STOCK ACCESSORY RAIL

1. Cover the inside bottom of the rail, any shims to be used, and the screws with a light coat of grease or mold-releaseagent.

2. Mix 5:1 epoxy and catalyst IAW manufacturer's instructions.

3. Fill accessory rail mortise with glass.

4. Attach any shims to be used and the top of the rail together.

5. Apply a light coat of Marine-tex® to the bottom side of the rail and any shims used.

6. Insert the rail into the mortise in the stock until either the shims or the rail make contact with the stock.

7. Wrap masking tape around the rail and stock, ensuring the rail remains centered with the stock. Allow epoxy to cure,undisturbed, for 24 hours.

8. When epoxy is hardened, unscrew the top rail from the bottom. Use a chisel to chip away any glass that has bled throughthe holes in the bottom rail.

9. Clean up any epoxy using a file and sandpaper.

10. Re-install the bipod stud if removed.

11. Ensure there is equal clearance between the top and bottom of the rail and the barrel. A maximum of four shims may beused. If more than four shims are needed, lowering of the barreled action in the stock is needed by skim glassing theweapon to re-center the barrel into the stock.

M40-087

M40-088

0026 00-6

TM 05539-IN


BREAKING WEAPON OUT OF GLASS

1. Place weapon upside-down in vise and remove the trigger guard screws and masking tape, securing trigger guard.

CAUTIONBe careful not to scar receiver or barrel when chipping away epoxy/glass residue.

2. Place the weapon upright in a vise and using a rawhide mallet and a wood chisel, chip away any epoxy/glass residue thatwill impede removal of the action from the stock.

3. Insert mandrel (20) inside receiver (5) and install action puller (21). Carefully remove barreled action from the stock(17) by turning clockwise and supporting the front of the barrel (10), allowing it to come up and out evenly.

CAUTIONIf the barreled action is removed unevenly, it will damage the glass bedding.

4. Lightly tap with rawhide mallet and brass hammer on top of magazine well/trigger guard assembly to release assemblyfrom stock.

M40-071

5

1021

20

17

0026 00-7

TM 05539-IN


SKIM GLASS CLEAN UP

1. Clean the barreled receiver, trigger guard, and the receiver screws of all epoxy, tape, and clay and set them aside.

NOTEEnsure bolt handle clears stock when re-bedding the stock.

2. Clean up stock and make all clearance cuts.a. Using a wood chisel, bevel glass area for recoil lug (22), front of barrel pad (28), and both front (23) and rear (24)

screw holes. Use a bearing scraper on bottom of stock.b. Clear glass area (25) to prevent bolt release pin from touching glass wall.c. Clear glass area (26) to prevent rear trigger pin from touching glass surface.d. Clear glass area (27) to prevent front trigger pin from touching glass surface.

END OF WORK PACKAGE

M40-072

22 23 24

262728 25

0026 00-8

TM 05539-IN

6

TELESCOPE ASSEMBLY AND TELESCOPE RINGS MAINTENANCE 0027 00


Inspection, Removal and Disassembly, Reassembly

INITIAL SETUP

Maintenance Level

Intermediate


Multi-tool

Materials/PartsSealing compound (Loctite 290) (Item 18, WP

0030 00)


INSPECTION

NOTE • The telescope is a warranted item. • No repair is authorized at the Intermediate Maintenance level.

1. Inspect for cracks, broken and scratched lenses, moisture inside the telescope, pits or chips that interfere with field ofview, damaged reticle, dents in the telescope body, and damaged telescope knobs or turret assemblies.

0027 00-1

TM 05539-IN

TELESCOPE ASSEMBLY AND TELESCOPE RINGS MAINTENANCE - CONTINUED 0027 00


2. Inspect and ensure that reticle has all mil dots in place and cross hairs are attached in the proper position. If unservice-able, replace telescope (5).

3. Check that the elevation knob (3) moves freely from 1 thorough 10 on the scale and is not bent; there should be distinctclicks. Replace unserviceable scopes (5) in accordance with current directives. For scopes that cannot be repaired, Inter-mediate Maintenance will designate Condition Code “W” and mark for rebuild by the manufacture. Condition Code “H”is not authorized for this scope. Once the replacement scope has been mounted, refer to the procedures outlined in TM05539-OR_ for zeroing and final adjustments, and make appropriate entries in the Weapon Record book.

4. Check that the elevation fine-tune adjustment lever moves through to the “V” on both sides of the scale. Adjustmentlever should be tight and should move with slight force.

5. Check that the windage knob (2) moves freely through all the numbers in both directions. If unserviceable, replace tele-scope (5).

6. Check that setscrews (1) are present and serviceable for each knob. Inspect and tighten setscrews as needed. Replacesetscrews if needed.

7. Inspect telescope ring bases (4) for damaged or missing pieces. If replacement is required, evacuate the telescope (5) tothe IMA.

M40-0125

4

3

21

0027 00-2

TM 05539-IN


REMOVAL AND DISASSEMBLY

CAUTION• THERE IS NO DISASSEMBLY AUTHORIZED OF THE TELESCOPE ASSEMBLY.• There are no user replaceable parts or disassembly procedures for parts within the telescope body such

as lenses or knobs.

NOTEBefore removal of the telescope assembly, note the location of the telescope to the optical platform forzero retention.

1. Loosen the hex-head nuts (7) on the base of the telescope ring bases (4) and remove the telescope (5) from the opticalplatform (6).

M40-013

4

7

6

5

0027 00-3

TM 05539-IN


REMOVAL AND DISASSEMBLY - CONTINUED

2. After removal of telescope (5) from optical platform, inspect that the objective body (8) and eyepiece lens body (9) aretight.

3. Grasp telescope (5) with one hand on the telescope objective body (8) and one hand on the eyepiece lens body (9), andtwist.

4. If the bodies (8 and 9) are loose, the telescope (5) needs to be replaced.

5. Inspect that the optical platform (6) is tight on weapon and that all four optical platform screws (10) are serviceable andare secured in place with Loctite 290.

M40-014

8 9

5

M40-016

10 6

0027 00-4

TM 05539-IN


REMOVAL AND DISASSEMBLY - CONTINUED

6. Remove 10 hex-head capscrews (12) and two top cap rings (11) from two telescope ring bases (4).7. Inspect capscrews (12), top cap rings (11), and ring bases (4) for damage. Replace if damaged.

M40-015

11 12 11

4

0027 00-5

TM 05539-IN


REASSEMBLY

1. Clean mating surface on telescope (5) and telescope ring bases (4).

NOTE

Be sure to place telescope ring bases on marks made on optical platform to ensure zero retention.

2. Attach telescope ring bases (4) to optical platform (6), push ring base forward and tighten. Tighten nuts (7) to 65 lb-in.

3. Place the telescope (5) on the telescope ring bases (4).

CAUTION

Ten hex-head capscrews must have a thread length of 0.375 in. (3/8-in.) or damage to scope ring basemay occur.

4. Install two scope ring top caps (11) over telescope (5) and secure to top caps with 10 hex-head capscrews (12).

5. Ensure the telescope is collimate to the weapon.

6. Hand tighten the 10 hex-head capscrews (12), alternating across diagonally. Keep an equal gap between the top cap ring(11) and the telescope base ring (4). Do not over-tighten. The screws need to be torqued to 20 lb-in.

END OF WORK PACKAGE

M40-017

1111

12

47 6

47

5

0027 00-6

TM 05539-IN

2

SUPPRESSOR MAINTENANCE 0028 00

There is no authorized maintenance for the sound suppressor. For suppressor cleaning procedure refer, to TM 05539-OR_.

END OF WORK PACKAGE

0028 00-1/(0028 00-2 Blank)

TM 05539-IN

CHAPTER 5SUPPORTING INFORMATION

TM 05539-IN

2

REFERENCES 0029 00

SCOPE

This work package lists all forms, field manuals, technical manuals, tables, regulations, standards, and miscellaneouspublications referenced in this manual.

MARINE CORPS ORDERS

Preparation for Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MCO P4450.7Report of Transportation Discrepancies in Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MCO P4610.19Product Quality Deficiency Report (PDQR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MCO 4855.10Ground Mishap Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MCO 5101.8Handling Transportation, Storage, Reclassification, and Disposal of Class V (W) Material . . . . . . . . . . . . . . . . . . MCO 8020.1Class V (W) Malfunctions and Deficiencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MCO 8025.1

FORMS

Inspection Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NAVMC 1018Weapons Custody Receipt Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NAVMC 10520Weapon Record Book, Part II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .NAVMC 10558AMemorandum Receipt for Individual Weapons and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NAVMC 10576Recommended Changes to Technical Publications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NAVMC 10772Product Quality Deficiency Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SF Form 368

TECHNICAL MANUALS

Pre-fire Inspection, Small Arms Weapons, Ordnance Materiel, and Trigger Pull Measurement Small Arms Weapons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TI 8005-24/20_

Organizational Corrosion Prevention and Control Procedures for USMC Equipment. . . . . . . . . . . . . . . . . . . . . TM 4795-12/1_Ground Equipment Record Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 4700-15/1_Materials Used for Cleaning, Preserving, Abrading, and Cementing Ordnance Materiels and

Related Materiels including Chemicals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-247_Military Use of Cleaner, Lubricant, Preservative (CLP) for Weapons and Support Equipment . . . . . . . . . . . . TM 9150-15/1__Operator’s Manual for Sniper Rifle, 7.62 MM, M40A3/M40A5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TM 05539-OR_

MILITARY STANDARDS

Military Standard, Marking for Shipment and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MIL-STD-129

END OF WORK PACKAGE

0029 00-1/(0029 00-2 Blank)

TM 05539-IN

2

EXPENDABLE AND DURABLE ITEMS LIST 0030 00

SCOPE

This work package lists expendable supplies and materials you may need to operate and maintain the 7.62 mm, M40A3/A5 Sniper Rifle. This listing is for information only and is not authority to requisition the listed items.

EXPLANATION OF COLUMNS

1. Column (1) - Item Number. This number is assigned to the entry in the list and is referenced in the narrative instruc-tions to identify the item [e.g., Use Paper, lens (Item 15, WP 0030 00).]

2. Column (2) - Maintenance Level. This column identifies the lowest level of maintenance that requires the listed item.O - Organizational Maintenance

F - Field Maintenance

3. Column (3) - National Stock Number. This is the NSN assigned to the item which you can use to requisition it.4. Column (4) - Description, CAGEC, and Part Number. This provides the other information you need to identify the

item.5. Column (5) - Unit of Measure (U/M). This code shows the physical measurement or count of an item, such as gallon,

dozen, gross, pint (PT), each (EA), bottle (BT), package (PG), can (CN), quart size container (QT), book (BK), bale(BE), etc.

0030 00-1

TM 05539-IN

EXPENDABLE AND DURABLE ITEMS LIST - CONTINUED 0030 00

END OF WORK PACKAGE

Table 1. Expendable and Durable Items List for M40A3/A5 Sniper Rifle.

0(1)

ITEMNUMBER

0(2)

LEVEL

0(3)

NATIONALSTOCK NUMBER

0(4)

DESCRIPTION, CAGEC,AND PART NUMBER

0(5)

U/M

1 O 6810-00-223-2739 Acetone 1 QT

2 F 8040-00-142-9193 Adhesive, cyanoacrylatic (superglue) 2 EA

3 O 6810-00-983-8551 Alcohol, cleaning fluid 3 QT

4 O 6515-00-303-8250 Applicator, cotton tip 4 PK

5 O 7920-00-205-0565 Brush, camel hair 5 EA

6 O 1005-00-494-6602 Brush, cleaning, all purpose 6 EA

7 F 7510-00-275-2679 Clay, modeling 7 LB

8 O P/N 699-000-005 Cleaning compound, powder solvent 84 oz can

OZ

9 O 9150-01-102-1473 Cleaner, lubricant and preservative, (CLP) 91/2 oz bottle

OZ

10 O P/ N 934-010-010 Lubricating oil, weapons (LAW) 10 OZ

11 F 8030-00N03-1802 Marine-tex®, putty epoxy 11 LB

12 F 8010-00-N0680-44 Marine-tex®, catalyst 12

13 F 8030-01-064-4951 Mold release compound 13 CN

14 O 6810-00-264-6715 Molybdenum disulfide 14 CN

15 O 6640-00-663-0832 Paper, lens 1550-sheet pack

BK

16 O 5350-00-721-8117 Sandpaper 16180-grit

PK

17 F 8030-00-408-1137 Sealing compound (nail polish) 17 TU

18 F 8030-00-081-2341 Sealing compound (Loctite 290) 18 BX

19 F 1005-01-566-6841 Thread sealant (Rocksett®) 19 EA

0030 00-2

TM 05539-IN

4

TOOL IDENTIFICATION LIST (INCLUDES SPECIAL TOOLS) 0031 00

SCOPE

This work package lists all common tools and supplements, and special tools/fixtures needed to maintain the 7.62 mm,M40A3/A5 Sniper Rifle.

EXPLANATION OF COLUMNS IN THE TOOL IDENTIFICATION LIST

1. Column (1) - Item Number. This column indicates the number of the illustration that shows the item.2. Column (2) - Item Name. This column lists the item by noun nomenclature and other descriptive features (e.g., Handle,

driver).3. Column (3) - National Stock Number. This is the National Stock Number (NSN) assigned to the item; use it to requi-

sition the item.4. Column (4) - Part Number/CAGEC. Indicates the primary number used by the manufacturer (individual, company,

firm, corporation, or Government activity) which controls the design and characteristics of the item by means of itsengineering drawings, specifications, standards, and inspection requirements to identify an item or range of items. Themanufacturer’s Commercial and Government Entity Code (CAGEC) is also included.

5. Column (5) - Unit of Measure (U/M). Indicates how the item is issued for the National Stock Number shown in Col-umns (2), such as each (EA) or kit (KT).

6. Column (6) - Quantity Recommended (Qty Rec’m). Qty Rec’m indicates the quantity recommended.

0031 00-1

TM 05539-IN

TOOL IDENTIFICATION LIST (INCLUDES SPECIAL TOOLS) - CONTINUED 0031 00

Table 1. Organizational and Intermediate Maintenance Special Tools and Equipment.

0(1)

ITEM NUMBER

0(2)

ITEM NAME

0(3)

NATIONALSTOCK NUMBER

0(4)

PART NUMBER/CAGEC

0(5)

U/M

0(6)

QTYREC’M

1 Test fixture, trigger pull 1 4933-00-647-3696 7274758/19204 1 EA 1 1 1

2 Tool, bolt disassembly 2 Local MFG 5H988 2 EA 2 1 2

3 Gage, firing pin protrusion 3 5120-00-345-6122 19204 3 EA 3 1 3

4 Tool, action puller assembly 4 Local MFG 5H988 4 EA 4 1 4

5 Tool, crowning 5 Local MFG 5 5 5

6 Crowning tool mandrel, .30 caliber 6

Local MFG 6 EA 6 1 6

7 T15 Torx bit with 1/4-in. drive socket 7

5120-01-428-8651 TTX15E 7 7 7

8 T30 Torx bit with 1/4 in. drive socket 8

5120-01-428-8701 TTX30E 8 EA 8 1 8

9 1/2-in. drive, 1/4-in. socket 9 5120-01-335-0941 TM16 9 9 9

10 Gage, headspace 10 10 10 10

11 Wrench, torque, 30 lb-in. to 150 lb-in. 11

5120-00-542-4489 81348 11 EA 11 1 11

12 Wrench, combination 12 5120-01-505-1677 1299757/19200 12 EA 12 1 12

13 Rounds, dummy, 7.62 mm(not shown) 13

669-308-020 13 EA 13 5 13

14 Screwdriver, jeweler’s (.080)(not shown) 14

5120-00-180-0729 81348 14 EA 14 1 14

0031 00-2

TM 05539-IN

TOOL IDENTIFICATION LIST (INCLUDES SPECIAL TOOLS) - CONTINUED 0031 00

END OF WORK PACKAGE

1

23

5

7

8 9 10

6

11

12

4

M40-037

0031 00-3/(0031 00-4 Blank)

TM 05539-IN

4

MANUFACTURED ITEMS ILLUSTRATIONS 0032 00


Manufactured Items

INITIAL SETUP


SCOPE

This work package includes complete instructions for making items authorized to be manufactured or fabricated at theIntermediate Maintenance level.

0032 00-1

TM 05539-IN

MANUFACTURED ITEMS ILLUSTRATIONS - CONTINUED 0032 00

MANUFACTURED ITEMS

M40-062

0032 00-2

TM 05539-IN


MANUFACTURED ITEMS - CONTINUED

M40-063

0032 00-3

TM 05539-IN


MANUFACTURED ITEMS - CONTINUED

M40-064

0032 00-4

TM 05539-IN

6

QUALITY ASSURANCE CHECKLIST 0033 00

QUALITY ASSURANCE CHECKLIST

M40A3/A5 SNIPER RIFLE QC CHECKLISTSECTION ONE

1. Perform Safety Check

QC QA

A. Remove magazine.

B. Inspect chamber for ammunition.

C. Function test the safety. There will be distinct clicks, positive catch, and no “mushiness”.

2. Inspect Muzzle Break (If Applicable)

QC QA

A. No cracks.

B. Centered.

C. No burrs within splines.

D. Refinished (blued or parked).

E. Barrel crown clean, uniform, smooth. Crown cut at 45 degrees.

3. Sling Swivels and Bipod

QC QA

A. Check for proper installation of sling swivels.

B. Ensure bipod has been installed.

4. Apparent Misalignment

QC QA

A. Check fit of magazine with bolt closed.

B. Magazine must not bind on stock or receiver.

5. Receiver to Stock Fit

QC QA

A. With rifle upside down, lightly tap top of buttstock on padded surface.

B. Complete serial number is written in barrel channel.

0033 00-1

TM 05539-IN

QUALITY ASSURANCE CHECKLIST - CONTINUED 0033 00

QUALITY ASSURANCE CHECKLIST - CONTINUED

M40A3/A5 SNIPER RIFLE QC CHECKLIST6. Stock

QC QA

A. Check for cracks around screw holes, sling swivel areas, and all welds.

B. Check buttstock and pads to ensure serviceability.

C. Ensure adjustable cheek piece goes up and down.

7. Barrel and Receiver Group

QC QA

A. Quickly cycle bolt in and out of battery three (3) times to simulate firing and ensure properfunction.

B. Check bolt; it should not pull out of the disassembly notch on firing.

C. Inspect optical platform welds for cracks.

D. Barrel will be free of carbon and rust.

E. Bolt guide will not be loose and ensure the barrel is knurled.

F. Barrel will have month, year, and PWS-P stamped near breech.

G. Receiver will be free of cracks and rust.

H. Rifle will be refinished and have a new appearance.

8. Bolt

QC QA

A. Bottom of extractor will not protrude past bottom of bolt.

B. Firing pin will be chromed with a smooth round top and no chips or cracks.

C. Face of bolt will not be chipped or cracked.

D. Inspect the lugs and rest of bolt body for cracks.

E. Bolt will be scribed with the entire serial number on underside.

9. Headspace and Breechbore

QC QA

A. Bolt will close on a 1.630 headspace gage.

B. Take breechbore reading. Minimum breechbore reading will be zero. Maximum reading will beeight (8).

0033 00-2

TM 05539-IN


QUALITY ASSURANCE CHECKLIST - CONTINUED

M40A3/A5 SNIPER RIFLE QC CHECKLIST10. Scope

QC QA

A. Check elevation for serviceability.

B. Check windage for serviceability.

C. Inspect objective and eyepiece lenses for scratches, pits, or chips that interfere with the field ofview.

D. Ensure reticle has all mil dots in place and that reticle is not loose from its post.

E. Check the scope; ensure it’s not bent, damaged or punctured.

F. Check the eyepiece focus ring and verify it is not cracked or unserviceable.

G. Check the eyepiece focus ring, ensure tight and serviceable.

H. Shake scope to detect loose glass.

I. Check for moisture (fogging).

J. Check eyepiece assembly for looseness from scope body.

K. Check objective assembly for looseness from scope body.

L. Scope serial number is noted in Weapon Record Book.

11. Trigger Weight

QC QA

A. Perform safety function test. Refer to WP 0019 00.

B. Minimum trigger weight is 3 lb. Maximum weight is 5 lb.

12. Final Check

QC QA

A. Inspect for proper lubrication.

B. Inspect Weapon Record Book for required and completed entries.

0033 00-3

TM 05539-IN


SECTION TWO

Quality Control Inspectors’ Verification

Rifle Serial Number ______________________

QC Rank and Name (Last, First, Middle) QA Rank and Name (Last, First, Middle)

QC Inspector’s Signature QA Inspector’s Signature

Inspection Date Inspection Date

0033 00-4

TM 05539-IN


SECTION THREE

Proof and Function Verification

Rifle Test Verification

a. PWS stands for Precision Weapons Section.b. P stands for proof fired.c. MO/YR stands for month and year of proof fire.

END OF WORK PACKAGE

Rifle Serial Number Date Proofed and Functioned



Date Tested



Group Size

0033 00-5/(0033 00-6 Blank)

TM 05539-IN

6

REPAIR PARTS LIST (RPL) INTRODUCTION 0034 00

SCOPE

This Repair Parts List (RPL) authorizes spares, repair parts, and other special support equipment required for perfor-mance of Organizational and Intermediate Maintenance of the 7.62 mm, M40A3/A5 Sniper Rifle. It authorizes the requisition-ing, issue and disposition of spares, repair parts indicated by the Source, Maintenance, and Recoverability (SMR) codes.

EXPLANATION OF COLUMNS

1. Item No. (Column 1). The item number indicates the number used to identify items called out in an illustration. 2. SMR Code (Column 2). The SMR code is a 5-position code containing supply/requisition information, maintenance

level authorization criteria, and disposition instructions as shown in the following manner:

NOTE * Complete repair: maintenance capacity, capability, and authority to perform all corrective mainte-nance tasks of the repair function in a user environment in order to restore serviceability to a faileditem.

SOURCE CODE MAINTENANCE CODE RECOVERABILITY CODE

XX 1st two positions How to obtain an

item.

X 3rd position

Who can install, replace or use the item.

X 4th position

Who can perform repair* on the item.

X 5th position

Who determines disposition action on an unserviceable item.

0034 00-1

TM 05539-IN

REPAIR PARTS LIST (RPL) INTRODUCTION - CONTINUED 0034 00

EXPLANATION OF COLUMNS - CONTINUED

a. Source Code. The source code indicates how to obtain an item needed for maintenance, repair, or overhaul ofequipment and is entered in the first and second positions of the SMR code as follows:

NOTE Cannibalizing or controlled exchange, when authorized, may be used as a source of supply for itemswith the above source codes, except for those coded XA.

SOURCE CODE ECHELON APPLICATION/EXPLANATION

PA Stocked items: Use the applicable National Stock Number (NSN) to requisition items with these source codes. These items are authorized to the level indicated by the code entered in the 3rd position of the SMR code.

NOTE Items Coded PC Are Subject to Deterioration.

PB

PC

PD

PE

PF

PG

KD Items with these codes are not to be requested/requisitioned individually. These items are part of a kit authorized to the maintenance level indicated in the 3rd position of the SMR code. The complete kit must be requisitioned and applied for. KF

KB

MO Org Items with these codes are not to be requisitioned individually. They must be made from bulk material identified by part number in the description column. No bulk material items are applicable for this weapon. MF 3rd

MH 4th

ML MH

MD Depot

AO Org Items with these codes are not to be requested/requisitioned individually. The parts that make the assembled items must be requisitioned, fabricated, or assembled at the level of maintenance indicated by source code. If the 3rd position code of the SMR code authorizes the item to be replaced, but the source code indicates the item is assembled at a higher level, order the item from the higher level of maintenance.

AF 3rd

AH 4th

AD Depot

XA Do not requisition an XA-coded item. Order its next higher assembly. (Also refer to the NOTE below).

XB If an XB item is not available from salvage, order it using the CAGE and part number given.

XC XC Installation drawing, diagram, instruction sheet, and field service drawing identified by the manufacturer’s part number.

XD XD Items not stocked. Order an XD-coded item through normal supply channels using the CAGE and part number given.

0034 00-2

TM 05539-IN



b. Maintenance Code. The maintenance code indicates the levels of maintenance authorized to use and repair sup-port items and is entered in the third and fourth positions of the SMR code as follows:

(1) The maintenance code entered in the third position indicates the lowest maintenance level authorized toremove, replace, and use an item. The maintenance code indicates one of the following maintenance lev-els:

(2) The maintenance code entered in the fourth position indicates whether or not the item is to be repaired andidentifies the lowest maintenance level with the capability to do complete repair (i.e., perform all autho-rized repair functions). The maintenance code indicates one of the following maintenance levels:

NOTE Some limited repair may be done on the item at a lower level of maintenance, if authorized by theSMR codes.

MAINTENANCE CODE APPLICATION/EXPLANATION

C Crew or operator maintenance done within unit maintenance.

O Organizational level can remove, replace, and use the item.

F Third echelon can remove, replace, and use the item.

H Fourth echelon can remove, replace, and use the item.

L Specialized repair activity can remove, replace, and use the item.

D Depot level can remove, replace, and use the item.

MAINTENANCE CODE APPLICATION/EXPLANATION

O Organizational level is the lowest level that can completely repair the item.

F Intermediate third echelon is the lowest level that can completely repair the item.

H Intermediate fourth echelon is the lowest level that can completely repair the item.

L Specialized repair activity (designated the specialized repair activity) is the lowest level that can completely repair the item.

D Depot level is the lowest level that can completely repair the item.

Z Non-repairable. No repair is authorized.

B No repair authorized. No parts or special tools are authorized for maintenance of a B-coded item. However, the item may be reconditioned by adjusting or lubricating at the user level.

0034 00-3

TM 05539-IN



c. Recoverability Code. The recoverability code indicates the disposition action on unserviceable items and isentered in the fifth position of the SMR code as follows:

3. NSN (Column 3). The national stock number for the item is listed in this column.

4. CAGE (Column 4). The Commercial and Government Entity Code is a 5-digit code used to identify the manufacturer,distributor, or government activity that supplies the item.

5. Part Number (Column 5). Indicates the primary number used by the manufacturer (individual, company, firm, corpo-ration, or government activity) that controls the design and characteristics of the items by means of its engineering draw-ings, specifications, standards, and inspection requirements to identify an item or range of items.

NOTE When a NSN is used to requisition an item, the item received may be a different part number from the part ordered.

6. Item Identification (Column 6). This column includes the following information:

a. Federal item name and, when required, a minimum description identifying the items.

b. The statement END OF FIGURE appears just below the last item description in Columns 6 and 7 for a given figurein WP 0033 00.

7. QTY (Column 7). The quantity (QTY) column indicates the quantity of the item used in the breakout shown on theillustration figure, which is prepared for a functional group, sub-functional group, or an assembly. The letter V appear-ing in this column in lieu of a quantity, indicates the quantity is variable and the quantity may vary from application toapplication.

RECOVERABILITY CODE APPLICATION/EXPLANATION

Z Non-repairable item. When unserviceable, condemn and dispose of the item at the level of maintenance shown in the third position of the SMR code.

O Repairable item. When uneconomically repairable, condemn and dispose of at the Organizational level.

F Repairable item. When uneconomically repairable, condemn and dispose of at the third echelon level.

H Repairable item. When uneconomically repairable, condemn and dispose of at the fourth echelon level.

D Repairable item. When uneconomically repairable, condemn and dispose of at the Depot level.

L Repairable item. Condemnation and disposal not authorized below specialized repair activity.

A Item requires special handling or condemnation procedures for specific reason (i.e., precious metal content, high dollar value, critical material or hazardous material). Refer to appropriate manuals/directives for specific instructions.

0034 00-4

TM 05539-IN


HOW TO LOCATE REPAIR PARTS

1. Unknown National Stock Number (NSN) or Part Number. a. Identify the item from the illustration and note the item number. b. Look in the Repair Parts List (RPL) for the figure and item numbers. The NSNs and part numbers are on the same

line as the associated item numbers. 2. Known NSN or Part Number.

a. Using the NSN or part number, locate the item in the RPL. Note the pertinent information. b. Verify the identity of the item.

END OF WORK PACKAGE

0034 00-5/(0034 00-6 Blank)

TM 05539-IN

14

Repair Parts List

REPAIR PARTS LIST (RPL) 0035 00

0035 00-1

TM 05539-IN

Figure 1. Bolt, Barrel, and Receiver with Trigger Assembly, Muzzle Brake, and Suppressor

M40-5004-1

0035 00-2

TM 05539-IN

(1)ITEMNO

(2)SMRCODE

(3)

NSN(4)CAGEC

(5)PARTNUMBER

(6)DESCRIPTION AND USEABLE ON CODES

(UOC)

(7)

QTY

FIG. 1 BOLT, BARREL, AND RECEIVER WITH TRIGGER ASSEMBLY, MUZZLE BRAKE, AND SUPPRESSOR

1 PAOFZ 1005-00-999-8821 50446 22041 PIN,FIRING ASSEMBLY................ 1

2 PAFFF 3A703 16861 BODY,BOLT ASSEMBLY................. 1

3 PAFZZ 1005-00-999-8818 50446 93712 .EXTRACTOR,CARTRIDGE............... 14 PAOZZ 5360-00-999-8817 50446 17019 .SPRING,EJECTOR.................... 1

5 PAOZZ 1005-00-999-8815 50446 17017 .EJECTOR,CARTRIDGE................. 1

6 PAOZZ 1005-00-999-8816 50446 94555 .PIN,EJECTOR....................... 17 MDDDD 3GUL2 99004A1102 LUG,RECOIL......................... 1

8 XADDD 3GUL2 N/A BARREL AND RECEIVER ASSY.M40A3(NOT A PROCURABLE ITEM)...................

1

8 XADDD 3GUL2 N/A BARREL AND RECEIVER ASSY.M40A5(NOT A PROCURABLE ITEM)...................

1

9 PAFZZ 5365-01-566-6499 0BJZ8 70121-1 SHIM SET........................... 1

10 PAFZZ 1005-01-565-6165 0BJZ8 MB762SSAL/RE

BRAKE,MUZZLE M40A5................. 1

11 PAOZF 1005-01-565-6164 0BJZ8 FA762SS-BK SUPPRESSOR,FLASH M40A5............. 112 XAFZZ 3A703 19461 CAM,SEAR-SAFETY.................... 1

13 PAFZZ 5360-00-887-5798 50446 17047 SPRING,HELICAL COMP................ 1

14 PAFZZ 5360-00-999-8812 50446 15224 SPRING,BOLT STOP................... 115 PAFZZ 1005-00-999-8809 50446 17013 STOP,BOLT.......................... 1

16 PAFZZ 5315-01-511-8332 3A703 24475 PIN,LOCK........................... 1

17 PAFZZ 1005-00-022-9777 50446 24476 PIN,SEAR........................... 118 PAFZZ 1005-01-511-8329 3A703 96028 PIN,SAFETY,SNIPER RIFLE............ 1

19 PAFZZ 1005-01-530-0452 3A703 15478 BOLT STOP RELEASE.................. 1

20 PAFZZ 1005-01-511-8314 3A703 96024 TRIGGER ASSEMBLY................... 121 PAFZZ 1005-01-518-3766 3A703 F92297 SAFETY,SMALL ARMS.................. 1

22 PAFZZ 1005-01-511-8319 3A703 23225 BALL,SAFETY,SNIPER................. 1

23 PAFZZ 1005-01-518-3772 3A703 15368 BRACKET,MOUNTING................... 124 PAFZZ 5310-00-887-5797 50446 17044 WASHER,SAFETY,SNAP................. 1

END OF FIGURE

1-1

0035 00-3

TM 05539-IN

Figure 2. Stock, Bipod, Trigger Guard, Magazine, and Sling

M40-5001-1

0035 00-4

TM 05539-IN

(1)ITEMNO

(2)SMRCODE

(3)

NSN(4)CAGEC

(5)PARTNUMBER


(UOC)

(7)

QTY

FIG. 2 STOCK, BIPOD, TRIGGER GUARD, MAGAZINE, AND SLING

1 PAOZZ 0A4K4 SPA SYS SCR

SCREW,RECOIL PAD................... 2

2 PAOZZ 1005-01-511-8420 0LB99 SPA-SYS PAD,RECOIL......................... 1

3 PAOZZ 5365-01-511-8431 0LB99 SPA-50 SPACER,RECOIL PAD 1/2 INCH........ 24 PAOZZ 5365-01-511-8424 0LB99 SPA-25 SPACER,PLATE 1/4 INCH............. 2

5 PAOZZ 5305-01-511-8438 0LB99 C/P KNOB SCREW,CHEEK,SNIPER................. 2

6 PAFZZ 5325-00-587-3306 96906 MS124775 INSERT,SCREW HEAD CRES HELICAL COIL FINE THREAD, 2 1/2" DIAMETER NOMINAL LENGTH

4

7 PAOZZ 1005-01-511-8433 0LB99 SAD C/P SUPPORT,CHEEK,SNIPER............... 1

8 XADDD 0A4K4 A-4 STOCK ASSEMBLY MODEL A4........... 19 PAOZZ L4041 A-004/M40/

04SCREW.............................. 6

10 PAOZZ L4041 A-004/M40/01

MOUNT,TOP.......................... 1

11 PAFZZ 5307-01-472-3395 1365 98003Q2003 STUD,BIPOD......................... 1

12 PAOZZ 1005-01-511-7758 57215 S-BRM BIPOD,RIFLE WITH LEG NOTCHES AND SWIVEL.............................

1

13 PAOZZ 1005-01-511-9944 ITE83 875 POD-LOC,BIPOD,SNIPER............... 114 PAOZZ 1005-01-511-8448 7R212 CC-35-SS SWIVEL,SLING....................... 1

15 PAFZZ 1005-01-557-3088 0WXH8 306-82-01 GUARD,TRIGGER...................... 1

16 PAFZZ 5305-01-511-8323 4J007 60655206 SCREW,CAP,HEXAGON H................ 217 PAFZZ 1005-01-557-3090 0WXH8 306-82--2 LEVER,MAGAZINE RELEASE............. 1

18 PAFZZ 1005-01-551-2742 0WXH8 306-82-5 SPRING,RELEASING LEVER............. 1

19 PAFZZ 5315-00-821-1225 80205 MS16555-329

PIN,STRAIGHT,HEADLESS.............. 1

20 PAFZZ 1005-01-557-3101 0WXH8 3901 MAGAZINE........................... 121 PAFZZ 1005-01-567-4936 19204 TISQCM2-7 SLING, CUFF........................ 1

END OF FIGURE

2-1

0035 00-5

TM 05539-IN

Figure 3. Telescope with Optical Platform and Ring Mount

M40-5002

0035 00-6

TM 05539-IN

(1)ITEMNO

(2)SMRCODE

(3)

NSN(4)CAGEC

(5)PARTNUMBER


(UOC)

(7)

QTY

FIG. 3 TELESCOPE WITH OPTICAL PLATFORM AND RING MOUNT

1 PAFZZ 1240-01-533-1854 090F8 PRM8541 TELESCOPE,ARTICULAT................ 12 PAFZZ 5340-01-512-0081 01365 990004A153

0BRACKET,SNIPER RIFLE............... 1

3 PAFZZ 5365-01-511-9954 0WXH8 306-24 SCOPE RING,SNIPER RIFLE............ 1

4 PAOZZ 5340-01-511-9812 0WXH8 306-05-4 .CLAMP,FOOT,REAR RING.............. 1

5 PAOZZ 5310-01-511-9822 0WXH8 306-05-9 .NUT,CROSS BOLT.................... 26 PAFZZ 5305-01-511-9829 0WXH8 306-05-08 .CAP SCREW RING ASSEMBLY.......... 10

7 PAOZZ 5340-01-511-9842 0WXH8 306-05-5 .CLAMP,FOOT,FRONT RING............. 1

8 PAFZZ 5305-01-511-9802 1JQC4 OP-700SA-SC

SCREW,SIGHT,SNIPER OPTICAL........PLATFORM MOUNTING

4

9 PAFZZ 1005-01-511-8443 1JQC4 OP-700SA-30

PLATFORM,OPTIC,SNIPER.............. 1

END OF FIGURE

3-1

0035 00-7

TM 05539-IN

Figure 4. Suppressor Case and Cleaning Brush

M40-5005

0035 00-8

TM 05539-IN

(1)ITEMNO

(2)SMRCODE

(3)

NSN(4)CAGEC

(5)PARTNUMBER


(UOC)

(7)

QTY

FIG. 4 SUPPRESSOR CASE AND CLEANING BRUSH

1 PAOZZ 8465-01-566-6807 OBJZ8 70014-1 CARRYING CASE, SUPPRESSOR.......... 12 PAOZZ 1005-01-566-6422 OBJZ8 70-03-015 BRUSH, CLEANING.................... 1

END OF FIGURE

4-1

0035 00-9

TM 05539-IN

0035 00-10

TM 05539-IN

CROSS-REFERENCE INDEXES

NATIONAL STOCK NUMBER INDEX

STOCK NUMBER FIG. ITEM STOCK NUMBER FIG. ITEM

1005-00-022-9777 1 15 1005-01-511-8433 2 75325-00-587-3306 2 6 5305-01-511-8438 2 55315-00-821-1225 2 19 1005-01-511-8443 3 95310-00-887-5797 1 22 1005-01-511-8448 2 145360-00-887-5798 1 11 5305-01-511-9802 3 81005-00-999-8809 1 13 5340-01-511-9812 3 45360-00-999-8812 1 12 5310-01-511-9822 3 51005-00-999-8815 1 5 5305-01-511-9829 3 61005-00-999-8816 1 6 5340-01-511-9842 3 75360-00-999-8817 1 4 1005-01-511-9944 2 131005-00-999-8818 1 3 5365-01-511-9954 3 31005-00-999-8821 1 1 5340-01-512-0081 3 25307-01-472-3395 2 11 1005-01-518-3766 1 191005-01-511-7758 2 12 1005-01-518-3772 1 211005-01-511-8314 1 18 1005-01-530-0452 1 171005-01-511-8319 1 20 1240-01-533-1854 3 15305-01-511-8323 2 16 1005-01-551-2742 2 181005-01-511-8329 1 16 1005-01-557-3088 2 155315-01-511-8332 1 14 1005-01-557-3090 2 171005-01-511-8420 2 2 1005-01-557-3101 2 205365-01-511-8424 2 4 1005-01-566-6422 4 25365-01-511-8431 2 3 5365-01-566-6499 1 91005-01-567-4936 2 21 8465-01-566-6807 4 1

I-1

0035 00-11

TM 05539-IN


PART NUMBER INDEX

CAGEC PART NUMBER STOCK NUMBER FIG. ITEM50446 15224 5360-00-999-8812 1 12

3A703 15368 1005-01-518-3772 1 21

3A703 15478 1005-01-530-0452 1 173A703 16861 1 2

50446 17013 1005-00-999-8809 1 13

50446 17017 1005-00-999-8815 1 550446 17019 5360-00-999-8817 1 4

50446 17044 5310-00-887-5797 1 22

50446 17047 5360-00-887-5798 1 11

3A703 19461 1 1050446 22041 1005-00-999-8821 1 1

3A703 23225 1005-01-511-8319 1 20

3A703 24475 5315-01-511-8332 1 1450446 24476 1005-00-022-9777 1 15

0WXH8 306-05-08 5305-01-511-9829 3 6

0WXH8 306-05-4 5340-01-511-9812 3 40WXH8 306-05-5 5340-01-511-9842 3 7

0WXH8 306-05-9 5310-01-511-9822 3 5

0WXH8 306-24 5365-01-511-9954 3 30WXH8 306-82-01 1005-01-557-3088 2 15

0WXH8 306-82--2 1005-01-557-3090 2 17

0WXH8 306-82-5 1005-01-551-2742 2 180WXH8 3901 1005-01-557-3101 2 20

4J007 60655206 5305-01-511-8323 2 16

OBJZ8 70014-1 8465-01-566-6807 4 1OBJZ8 70121-1 5365-01-566-6499 1 9

OBJZ8 70-03-015 1005-01-566-6422 4 2

ITE83 875 1005-01-511-9944 2 1350446 93712 1005-00-999-8818 1 3

50446 94555 1005-00-999-8816 1 6

3A703 96024 1005-01-511-8314 1 183A703 96028 1005-01-511-8329 1 16

1365 98003Q2003 5307-01-472-3395 2 11

01365 990004A1530 5340-01-512-0081 3 23GUL2 99004A1102 1 7

L4041 A-004/M40/01 2 10

L4041 A-004/M40/04 2 90A4K4 A-4 2 8

0LB99 C/P KNOB 5305-01-511-8438 2 5

7R212 CC-35-SS 1005-01-511-8448 2 143A703 F92297 1005-01-518-3766 1 19

OBJZ8 FA762SS-8K 1005-01-565-6164 1 11

OBJZ8 MB762SSAL/RE 1005-01-565-6165 1 1096906 MS124775 5325-00-587-3306 2 6

19204 TISQCM2-7 1005-01-567-4639 2 21

I-2

0035 00-12

TM 05539-IN


PART NUMBER INDEXCAGEC PART NUMBER STOCK NUMBER FIG. ITEM

80205 MS16555-329 5315-00-821-1225 2 19

1JQC4 OP-700SA-30 1005-01-511-8443 3 91JQC4 OP-700SA-SC 5305-01-511-9802 3 8

090F8 PRM8541 1240-01-533-1854 3 1

0LB99 SAD C/P 1005-01-511-8433 2 7

57215 S-BRM 1005-01-511-7758 2 120A4K4 SPA SYS SCR 2 1

0LB99 SPA-25 5365-01-511-8424 2 4

0LB99 SPA-50 5365-01-511-8431 2 30LB99 SPA-SYS 1005-01-511-8420 2 2

3GUL2 TBD-BAR 1 8

3GUL2 TBD-BAR 2 1 8OBJZ8 TBD-SLING 2 21

I-3

0035 00-13/(0035 00-14 Blank)

TM 05539-IN

INDEXSubject Work Package/Page

AAmmunition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0002 00-6

Associated Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0002 00-6B

Barreled Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0022 00-1

Bipod Assembly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0018 00-1

Bolt BodyAssembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0023 00-1Assembly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0013 00-1

CCleaning the Weapon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0010 00-1

Corrosion Prevention and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0001 00-1D

Depot Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0001 00-1

Description of Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0002 00-2

Disassembly of Weapon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00-1E

Equipment Description and Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0002 00-1

Expendable and Durable Items List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0030 00-1F

Firing Pin Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0014 00-1

Forms, Records, and Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0001 00-1

Function Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0020 00-1G

GeneralInformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0001 00-1Maintenance Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0009 00-1

IIssue and Recovery of Individual Weapons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0001 00-1

MMagazine Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0011 00-1

Manufactured Items Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0032 00-1

Muzzle Break Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0017 00-1N

Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0002 00-1

Index-1

TM 05539-IN

INDEX - ContinuedSubject Work Package/Page

OOperation, Principles of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0003 00-1

PPreparation for Storage and Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0021 00-1

Preventive Maintenance Checks and Services (PMCS), Including Lubrication Instructions . . 0008 00-1

Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0003 00-1Q

Quality Assurance Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0033 00-1R

Reassembly of Weapon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0019 00-1

Reference Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0002 00-7

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0029 00-1

Removal of Barreled Receiver from Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0016 00-1

Repair Parts List (RPL)Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0035 00-1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0034 00-1

Reporting Equipment Improvement Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0001 00-1S

Safety and Trigger Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0024 00-1

Service Upon Receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0007 00-1

Skim Glassing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0026 00-1

Stock Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0025 00-1

Suppressor Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0028 00-1T

Telescope Assembly and Telescope Rings Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0027 00-1

Tool Identification List (Includes Special Tools) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0031 00-1

Trigger Guard and Magazine Well Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0015 00-1

TroubleshootingIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0004 00-1Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0006 00-1Symptom Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0005 00-1

Index-2

THE METRIC SYSTEM AND EQUIVALENTS

APPROXIMATE CONVERSION FACTORS

Linear Measure

1 Centimeter = 10 Millimeters = 0.01 Meters = 0.3937 Inches1 Meter = 100 Centimeters = 1000 Millimeters = 39.37 Inches1 Kilometer = 1000 Meters = 0.621 Miles

Weights

1 Gram = 0.001 Kilograms = 1000 Milligrams = 0.035 Ounces1 Kilogram = 1000 Grams = 2.2 Pounds1 Metric Ton = 1000 Kilograms = 1 Megagram = 1.1 Short Tons

Liquid Measure

1 Milliliter = 0.001 Liters = 0.0338 Fluid Ounces1 Liter = 1000 Milliliters = 33.82 Fluid Ounces

Square Measure

1 Sq Centimeter = 100 Sq Millimeters = 0.155 Sq Inches1 Sq Meter = 10,000 Sq Centimeters = 10.76 Sq Feet1 Sq Kilometer = 1,000,000 Sq Meters = 0.0386 Sq Miles

Cubic Measure

1 Cu Centimeter = 1,000 Cu Millimeters = 0.06 Cu Inches1 Cu Meter = 1,000,000 Cu Centimeters = 35.31 Cu Feet

Temperature

5/9 (°F - 32) = °C212° Fahrenheit is equivalent to 100° Celsius90° Fahrenheit is equivalent to 32.2° Celsius32° Fahrenheit is equivalent to 0° Celsius9/5 C° +32 = F°

To Change To Multiply By

Inches Centimeters 2.540

Feet Meters 0.305

Yards Meters 0.914

Miles Kilometers 1.609

Sq Inches Sq Centimeters 6.451

Sq Feet Sq Meters 0.093

Sq Yards Sq Meters 0.836

Sq Miles Sq Kilometers 2.590

Acres Sq Hectometers 0.405

Cubic Feet Cubic Meters 0.028

Cubic Yards Cubic Meters 0.765

Fluid Ounces Milliliters 29.573

Pints Liters 0.473

Quarts Liters 0.946

Gallons Liters 3.785

Ounces Grams 28.349

Pounds Kilograms 0.454

Short Tons Metric Tons 0.907

Pound-Feet Newton-Meters 1.356

Pounds per Sq Inch

Kilopascals 6.895

Miles per Gallon Kilometers per Liter 0.425

Miles per Hour Kilometers per Hour 1.609

To Change To Multiply By

Centimeters Inches 0.394

Meters Feet 3.280

Meters Yards 1.094

Kilometers Miles 0.621

Sq Centimeters Sq Inches 0.155

Sq Meters Sq Feet 10.764

Sq Meters Sq Yards 1.196

Sq Kilometers Sq Miles 0.386

Sq Hectometers Acres 2.471

Cubic Meters Cubic Feet 35.315

Cubic Meters Cubic Yards 1.308

Milliliters Fluid Ounces 0.034

Liters Pints 2.113

Liters Quarts 1.057

Liters Gallons 0.264

Grams Ounces 0.035

Kilograms Pounds 2.205

Metric Tons Short Tons 1.102

Newton-Meters Pound-Feet 0.738

Kilopascals Pounds per Sq Inch

0.145

Kilometers per Liter Miles per Gallon 2.354

Kilometers per Hour Miles per Hour 0.621

FOR SNIPER RIFLE, 7.62 MM, M40A3 - Public...

Documents

Transcript of FOR SNIPER RIFLE, 7.62 MM, M40A3 - Public...